Configuring the .env File

The Nextcloud Exchange Connector is entirely configuration-driven. This reference guide explains every parameter available to customize the synchronization behavior, performance limits, and connectivity of your application.

Tip: This configuration guide is extensive. To quickly find a specific parameter from your .env file, use your browser's search function (Ctrl + F or Cmd + F) and enter the variable name.

Warning: Strict File Naming

Your configuration file must be named exactly “.env” (an empty filename with an .env extension). Naming the file settings.env or anything else will cause the application to fail to read the configuration.

Warning: Escaping Special Characters in Docker

When configuring passwords, connection strings, or secrets in your .env file, be aware of Docker's character constraints. Specifically, the dollar sign $) is reserved for variable interpolation. If your actual password contains a literal $, you must escape it by doubling the character (e.g., a password of Pa$word must be written as Pa$$word in the .env file).

Failure to escape this will cause Docker to drop the character, resulting in severe authentication errors.

Configuration Strategy: Minimal vs. Full

To simplify deployments, it is recommended to build your .env file based on your needs:

Minimal Config for Docker deployment (Single Instance)
Full Config for Docker deployment (Multi-Instance)
Minimal Config for Binary deployment (Single Instance)
Full Config for Binary deployment (Multi-Instance)

Configuration Reference

Service Configuration

These settings control the core behavior, identification, and scheduling of the synchronization instances.

Parameter	Meaning & Usage	Example	Applies To
`Service__IsPrimary`	Meaning: Dictates if this instance is the primary synchronization coordinator. Usage: Exactly one instance must be set to `true`. All secondary replicas or workers must be `false`.	`true`	Docker, Binary
`Service__DeploymentType`	Meaning: Specifies the hosting method. Usage: Set to `0` for Docker or `1` for Binary deployments.	`0`	Docker, Binary
`Service__AspNetCoreUrl`	Meaning: The internal port and URL for the application. Usage: Must be unique for every instance running on the same host to prevent port collisions.	`http://localhost:5001`	Binary
`Service__DefaultWorkerName`	Meaning: The unique identifier for the instance. Usage: Used in logs and database tracking to identify which worker processed a task.	`"SendentWorker-1"`	Docker, Binary
`Service__BatchLimit`	Meaning: Maximum number of elements per EWS request. Usage: Prevents overloading the Exchange server with excessively large single payloads.	`50`	Docker, Binary
`Service__WorkerIntervalSeconds`	Meaning: The sleep interval between global application runs. Usage: Determines how often the application checks the database for new users to process.	`120`	Docker, Binary
`Service__SyncIntervalInSeconds`	Meaning: The standard cooldown delay before a specific user is scheduled for their next sync. Usage: Prevents continuous looping on the same user.	`60`	Docker, Binary
`Service__CriticalSyncIntervalInSeconds`	Meaning: The retry delay for users whose synchronization failed. Usage: Gives the system time to recover before retrying a broken sync.	`100`	Docker, Binary
`Service__BatchSaveSize`	Meaning: Database transaction chunk size. Usage: Maximum number of objects saved to the database in a single transaction.	`100`	Docker, Binary
`Service__StartWeekend`	Meaning: Defines the day that marks the start of the weekend. Usage: Used in calendar logic (1 = Monday, 6 = Saturday, 7 = Sunday).	`6`	Docker, Binary
`Service__SyncMode`	Meaning: Declares which data entities are synchronized. Usage: Bitwise value (`1`=Calendars, `2`=Contacts). Sum them up to combine (e.g., `3` for Calendars + Contacts).	`1`	Docker, Binary
`Service__SyncType`	Meaning: Level of detail for synchronization. Usage: Set to `0` for Full sync (all data), or `1` for Sensitive sync (hides confidential details).	`1`	Docker, Binary

What is the difference between Full and Sensitive Sync?

Synchronization modes determine the level of data privacy when transferring between calendars.

Full Synchronization:

Absolutely everything is synced.
NextCloud and Exchange fully map events, creating the missing entities on both servers.
The comparison mechanism uses hash codes and modification dates to make update decisions.

Sensitive Synchronization:

Nextcloud —> Exchange:

All data related to identification is completely "scrubbed".
Only the following data is kept: datetime, timezone, length, and reminder.
Events are displayed in Exchange as empty slots ("dummies") for time booking without revealing details.

Exchange —> Nextcloud:

All event data is synced; however, the recipients list is forced into the appointment body.
Events are marked in red for visual distinction.

In Sensitive Sync mode, attachments are not synced in either direction.

Pro Tip

When using Sensitive Sync, modifying events is only allowed in their "native" calendars. Any attempt to change the description or status of a NextCloud event via Exchange will be rejected, and the application will revert it to its original empty state. Similarly, attempts to modify Exchange events via NextCloud are blocked and reverted.

Database Configuration

These settings connect the application to your storage backend.

Parameter	Meaning & Usage	Example	Applies To
`DatabaseConfiguration__DatabaseType`	Meaning: Selects the database provider. Usage: `0`=Postgres, `1`=SqlServer, `2`=MariaDB, `3`=MySql.	`0`	Docker, Binary
`DatabaseConfiguration__DatabaseEncryptionKey`	Meaning: Secret key for encrypting sensitive data. Usage: Used to encrypt Nextcloud app-tokens stored in the database.	`YourSuperSecretKey123!`	Docker, Binary
`DatabaseConfiguration__ConnectionString`	Meaning: The connection string to reach the database. Usage: Format strictly depends on your chosen database provider.	`Host=postgres_db;Port=5432;...`	Docker, Binary

Nextcloud Configuration

These settings belong on the DAV sync client (Provider=Dav). They must match the Nextcloud URL, service account, and Shared Secret from the Sendent Sync app.

Warning: Shared Secret Mismatch

Your EventSyncClients__1__Settings__SharedSecret value must exactly match the shared secret generated in the Sendent Sync app within your Nextcloud web interface.

Parameter	Meaning & Usage	Example	Applies To
`EventSyncClients__1__Settings__BaseUrl`	Meaning: The Base URL of your Nextcloud instance. Usage: Must include the protocol (http/https).	`https://cloud.example.com/`	Docker, Binary
`EventSyncClients__1__Settings__ServiceUsername`	Meaning: Username of the Nextcloud service account. Usage: Used to authenticate API calls to Nextcloud.	`serviceAdmin`	Docker, Binary
`EventSyncClients__1__Settings__ServicePassword`	Meaning: Password of the Nextcloud service account. Usage: Plaintext password or app-password for the admin.	`SecurePass123`	Docker, Binary
`EventSyncClients__1__Settings__SharedSecret`	Meaning: Cryptographic shared secret. Usage: Used to securely transfer user consent tokens from Nextcloud to the connector.	`"my_secure_secret"`	Docker, Binary

Exchange Server Configuration

Optional admin-pool settings. The Exchange connection itself is configured on EventSyncClients in the next section.

Parameter	Meaning & Usage	Example	Applies To
`Service__ExchangeConfiguration__ExchangeTenantId`	Meaning: Microsoft tenant ID for the webhook path. Usage: Optional. Calendar sync reads `TenantId` from the EWS/Graph client, not from this key.	`xxxx-xxxx-xxxx-xxxx`	Docker, Binary
`Service__ExchangeConfiguration__ExchangeAdminFile`	Meaning: Path to a JSON file of extra Exchange admin accounts. Usage: Optional. Use only for an admin pool. Connection settings stay on `EventSyncClients`.	`admins.json`	Docker, Binary
Service__ExchangeConfiguration__ExchangeAdminRaw	Meaning: Same admin list as a JSON array in `.env`. Usage: Optional alternative to `ExchangeAdminFile`. Do not put this key under `EventSyncClients__*__Settings`.	`[{"AppId":"...","ClientSecret":"..."}]`	Docker, Binary

Sync Clients

The connector syncs a pair of clients: one Exchange-side (Ews or Graph) and one Nextcloud-side (Dav). Identifier values must match EventSync__Pairs.

Indexes in the examples: __0__ = Exchange (EWS or Graph), __1__ = DAV.

Warning: EventSyncClients__*__Settings__ExchangeOnPremUrl and ExchangeOnPremDomain are invalid. On an on-premise EWS client the keys are OnPremUrl and OnPremDomain.

Parameter	Meaning & Usage	Example	Applies To
`EventSyncClients__0__Identifier`	Meaning: Name of the Exchange-side client. Usage: Referenced by `EventSync__Pairs`. Use `ews` or `graph`.	`ews`	Docker, Binary
`EventSyncClients__0__Provider`	Meaning: Exchange-side stack. Usage: `Ews` or `Graph`.	`Ews`	Docker, Binary
`EventSyncClients__1__Identifier`	Meaning: Name of the Nextcloud client. Usage: Must match the pair target.	`dav`	Docker, Binary
`EventSyncClients__1__Provider`	Meaning: Nextcloud stack. Usage: Always `Dav`.	`Dav`	Docker, Binary
`EventSync__Pairs__0__SourceClientId`	Meaning: The Exchange-side client in the pair. Usage: Must match `EventSyncClients__0__Identifier`.	`ews`	Docker, Binary
`EventSync__Pairs__0__TargetClientId`	Meaning: The Nextcloud-side client in the pair. Usage: Must match `EventSyncClients__1__Identifier`.	`dav`	Docker, Binary
`EventSync__CalendarPriorityOrder__0`	Meaning: Highest-priority calendar source on conflict. Usage: Usually the same Identifier as the Exchange client.	`ews`	Docker, Binary
`EventSync__CalendarPriorityOrder__1`	Meaning: Fallback calendar source on conflict. Usage: Usually the DAV Identifier.	`dav`	Docker, Binary

Concurrency Configuration

These settings control the application's throughput and scaling behavior.

Parameter	Meaning & Usage	Example	Applies To
`Service__ConcurrencyConfiguration__MaxParallelProcessingUsers`	Meaning: Global limit of concurrent users processed per instance. Usage: Prevents a single worker node from running out of RAM.	`10`	Docker, Binary
`Service__ConcurrencyConfiguration__MaxUsersPerAdmin`	Meaning: Maximum users processed concurrently by a single Exchange service account. Usage: Prevents Microsoft Exchange from throttling your connections.	`10`	Docker, Binary
`Secondary_Replicas_Amount`	Meaning: The number of secondary containers to deploy automatically. Usage: Scales your synchronization power. Ignored in Binary deployments.	`2`	Docker

EWS settings (`Provider=Ews`)

Parameter	Meaning & Usage	Example	Applies To
`EventSyncClients__0__Settings__ExchangeType`	Meaning: EWS environment. Usage: `1`=Cloud (M365), `2`=OnPremKerberos, `3`=OnPremBasicAuth, `4`=OnPremADFS. Graph has no `ExchangeType`.	`1`	Docker, Binary
`EventSyncClients__0__Settings__TenantId`	Meaning: Microsoft Entra tenant ID. Usage: EWS Cloud (`ExchangeType=1`) only.	`xxxx-xxxx-xxxx-xxxx`	Docker, Binary
`EventSyncClients__0__Settings__AppId`	Meaning: Entra application (client) ID. Usage: EWS Cloud only.	`your-app-id`	Docker, Binary
`EventSyncClients__0__Settings__ClientSecret`	Meaning: Entra client secret. Usage: EWS Cloud, or ADFS (`ExchangeType=4`).	`your-client-secret`	Docker, Binary
`EventSyncClients__0__Settings__OnPremUrl`	Meaning: EWS endpoint URL. Usage: On-premise EWS only (`ExchangeType=2/3/4`). Not `ExchangeOnPremUrl`.	`https://exchange.example.com/EWS/Exchange.asmx`	Docker, Binary
`EventSyncClients__0__Settings__OnPremDomain`	Meaning: Active Directory domain of the service account. Usage: Kerberos and BasicAuth (`ExchangeType=2/3`) only.	`example.com`	Docker, Binary
`EventSyncClients__0__Settings__UserName`	Meaning: On-premise service account. Usage: Kerberos and BasicAuth only.	`sync-admin`	Docker, Binary
`EventSyncClients__0__Settings__Password`	Meaning: Password for that service account. Usage: Kerberos and BasicAuth only.	`SecurePass123`	Docker, Binary
`EventSyncClients__0__Settings__OnPremAdfsAuthorityUrl`	Meaning: ADFS authority URL. Usage: ADFS (`ExchangeType=4`) only.	`https://adfs.example.com/adfs`	Docker, Binary
`EventSyncClients__0__Settings__ClientId`	Meaning: ADFS client ID. Usage: ADFS only.	`your-adfs-client-id`	Docker, Binary

Graph settings (`Provider=Graph`)

Use these instead of the EWS settings when the Exchange-side client is Graph. Do not set ExchangeType, OnPremUrl, or OnPremDomain.

Parameter	Meaning & Usage	Example	Applies To
`EventSyncClients__0__Settings__TenantId`	Meaning: Microsoft Entra tenant ID. Usage: Required for Graph.	`xxxx-xxxx-xxxx-xxxx`	Docker, Binary
`EventSyncClients__0__Settings__AppId`	Meaning: Graph application (client) ID. Usage:The Graph app registration, not the old EWS app.	`your-graph-app-id`	Docker, Binary
`EventSyncClients__0__Settings__ClientSecret`	Meaning: Graph client secret. Usage: Required for Graph.	`your-graph-client-secret`	Docker, Binary
`EventSyncClients__0__Settings__OutlookTimeZone`	Meaning: Timezone Graph uses for event start/end. Usage: Optional.	`W. Europe Standard Time`	Docker, Binary

DAV keys are in the Nextcloud Configuration table above.

Specific Synchronization Configurations

Parameter	Meaning & Usage	Example	Applies To
`Service__FullSyncConfiguration__ProcessAttachments`	Meaning: Allows or disallows processing of attachments. Usage: Applicable only when `Service__SyncType=0` (Full Sync).	`true`	Docker, Binary
`Service__SensitiveSyncConfiguration__SensitiveTitle`	Meaning: Custom title applied to events in Exchange. Usage: Hides meeting details when `Service__SyncType=1` (Sensitive Sync).	`"Busy"`	Docker, Binary
`Service__SensitiveSyncConfiguration__SensitiveCategory`	Meaning: Custom category tag applied to events. Usage: Categorizes events originating from Nextcloud in the user's Exchange calendar.	`"Nextcloud Sync"`	Docker, Binary

Logging & Monitoring Configuration

These settings control how and where the application outputs health and debug data.

Warning: Grafana Security

If you choose to enable Grafana logging (Service__LoggingConfiguration__LogsOutput includes value 8), be aware that the Grafana web interface is designed to run securely within the local host machine only.

It is intentionally not exposed or forwarded to external networks.

Parameter	Meaning & Usage	Example	Applies To
`Serilog__MinimumLevel__Default`	Meaning: The global log verbosity level. Usage: Acceptable values are `Debug`, `Information`,`Warning`, `Error`. The default value is `In`. Change to `Debug` only if requested by Sendent Support.	`Error`	Docker, Binary
`Service__LoggingConfiguration__LogsOutput`	Meaning: Determines where logs are stored (Bitwise). Usage: `1`=Console, `2`=Database, `4`=File, `8`=Grafana. Combine by summing (e.g., `5` = Console + File).	`5`	Docker, Binary
`Service__LoggingConfiguration__LogDirectoryPath`	Meaning: Name of the folder where file logs are saved. Usage: A directory will be automatically created with this name.	`SendentLogs`	Docker, Binary
`Service__LoggingConfiguration__LogFileSizeLimit`	Meaning: Maximum size of a single log file. Usage: Expressed in Megabytes (MB). Controls log rotation.	`50`	Docker, Binary
`Service__LoggingConfiguration__LogFileAmountLimit`	Meaning: Maximum number of log files to retain. Usage: Older files are automatically deleted to save disk space.	`20`	Docker, Binary
`Service__LoggingConfiguration__LokiInternalUrl`	Meaning: Internal URL used to push logs to Loki. Usage: Required only if Grafana log output is enabled.	`http://loki:3100`	Docker
`GRAFANA_USER` / `GRAFANA_PASSWORD`	Meaning: Custom administrator credentials for Grafana. Usage: Used to log into the Grafana UI.	`SuperAdmin`	Docker

Example Configurations

Minimal Config for Docker deployment (Single Instance)

# Service Configuration
Service__StartWeekend=6
Service__SyncMode=1
Service__SyncType=0
 
# Database Configuration
DatabaseConfiguration__DatabaseType=2
DatabaseConfiguration__DatabaseEncryptionKey=YourSuperSecretKey123!
DatabaseConfiguration__ConnectionString=YourDatabaseConnectionString
 
# Exchange Configuration
Service__ExchangeConfiguration__ExchangeAdminFile=
 
# Sync Clients — REQUIRED
# For Graph, set Identifier/Provider to graph and drop ExchangeType.
# For on-premise Kerberos, set ExchangeType=2 and use OnPremUrl / OnPremDomain / UserName / Password (not ExchangeOnPremUrl).
EventSyncClients__0__Identifier=ews
EventSyncClients__0__Provider=Ews
EventSyncClients__0__Settings__ExchangeType=1
EventSyncClients__0__Settings__TenantId=yor-exchange-tenant-id
EventSyncClients__0__Settings__AppId=your-app-id
EventSyncClients__0__Settings__ClientSecret=your-client-secret
 
EventSyncClients__1__Identifier=dav
EventSyncClients__1__Provider=Dav
EventSyncClients__1__Settings__BaseUrl=your-nextcloud-base-url
EventSyncClients__1__Settings__ServiceUsername=your-nextcloud-admin
EventSyncClients__1__Settings__ServicePassword=your-nextcloud-password
EventSyncClients__1__Settings__SharedSecret=your-shared-secret
 
EventSync__Pairs__0__SourceClientId=ews
EventSync__Pairs__0__TargetClientId=dav
EventSync__CalendarPriorityOrder__0=ews
EventSync__CalendarPriorityOrder__1=dav
 
# Full Synchronization Configuration
Service__FullSyncConfiguration__ProcessAttachments=true
 
# Sensitive Synchronization Configuration
Service__SensitiveSyncConfiguration__SensitiveTitle="Busy"
Service__SensitiveSyncConfiguration__SensitiveCategory="Nextcloud Sync"
 
# Logging (Serilog & Loki)
Serilog__MinimumLevel__Default=Error
Service__LoggingConfiguration__LogsOutput=3
Service__LoggingConfiguration__LogDirectoryPath=
Service__LoggingConfiguration__LogFileSizeLimit=50
Service__LoggingConfiguration__LogFileAmountLimit=20
Service__LoggingConfiguration__LokiInternalUrl=http://loki:3100
 
# Grafana Configuration
GRAFANA_USER="YourAdminLogin"
GRAFANA_PASSWORD="YourAdminPassword"

Full Config for Docker deployment (Multi-Instance)

# Service Configuration
Service__IsPrimary=true
Service__DeploymentType=0
Service__DefaultWorkerName="SendentWorker"
 
# NOTE: these four are real settings, but are NOT in the default docker-compose.yml
# environment: allowlist yet — add their names there before they take effect.
Service__BatchLimit=50
Service__WorkerIntervalSeconds=60
Service__BatchSaveSize=100
Service__StartWeekend=6
 
Service__SyncMode=1
Service__SyncType=0
 
# Database Configuration
DatabaseConfiguration__DatabaseType=2
DatabaseConfiguration__DatabaseEncryptionKey=YourSuperSecretKey123!
DatabaseConfiguration__ConnectionString=YourDatabaseConnectionString
 
# Exchange Configuration
Service__ExchangeConfiguration__ExchangeAdminFile=
 
# Sync Clients — REQUIRED
# For Graph, set Identifier/Provider to graph and drop ExchangeType.
# For on-premise Kerberos, set ExchangeType=2 and use OnPremUrl / OnPremDomain / UserName / Password (not ExchangeOnPremUrl).
EventSyncClients__0__Identifier=ews
EventSyncClients__0__Provider=Ews
EventSyncClients__0__Settings__ExchangeType=1
EventSyncClients__0__Settings__TenantId=yor-exchange-tenant-id
EventSyncClients__0__Settings__AppId=your-app-id
EventSyncClients__0__Settings__ClientSecret=your-client-secret
 
EventSyncClients__1__Identifier=dav
EventSyncClients__1__Provider=Dav
EventSyncClients__1__Settings__BaseUrl=your-nextcloud-base-url
EventSyncClients__1__Settings__ServiceUsername=your-nextcloud-admin
EventSyncClients__1__Settings__ServicePassword=your-nextcloud-password
EventSyncClients__1__Settings__SharedSecret=your-shared-secret
 
EventSync__Pairs__0__SourceClientId=ews
EventSync__Pairs__0__TargetClientId=dav
EventSync__CalendarPriorityOrder__0=ews
EventSync__CalendarPriorityOrder__1=dav
 
# Concurrency Configuration
Service__ConcurrencyConfiguration__MaxParallelProcessingUsers=100
Service__ConcurrencyConfiguration__MaxUsersPerAdmin=100
Secondary_Replicas_Amount=2
 
# Full Synchronization Configuration
Service__FullSyncConfiguration__ProcessAttachments=true
 
# Sensitive Synchronization Configuration
Service__SensitiveSyncConfiguration__SensitiveTitle="Busy"
Service__SensitiveSyncConfiguration__SensitiveCategory="Nextcloud Sync"
 
# Logging (Serilog & Loki)
Serilog__MinimumLevel__Default=Error
Service__LoggingConfiguration__LogsOutput=9
Service__LoggingConfiguration__LogDirectoryPath=
Service__LoggingConfiguration__LogFileSizeLimit=50
Service__LoggingConfiguration__LogFileAmountLimit=20
Service__LoggingConfiguration__LokiInternalUrl=http://loki:3100
 
# Grafana Configuration
GRAFANA_USER="YourAdminLogin"
GRAFANA_PASSWORD="YourAdminPassword"

Minimal Config for Binary deployment (Single Instance)

# Service Configuration
Service__IsPrimary=true
Service__DeploymentType=1
Service__AspNetCoreUrl="http://localhost:5001"
Service__DefaultWorkerName="SendentWorker-1"
Service__StartWeekend=6
Service__SyncMode=1
Service__SyncType=0
 
# Database Configuration
DatabaseConfiguration__DatabaseType=2
DatabaseConfiguration__DatabaseEncryptionKey=YourSuperSecretKey123!
DatabaseConfiguration__ConnectionString=YourDatabaseConnectionString
 
# Exchange Configuration
Service__ExchangeConfiguration__ExchangeAdminFile=
 
# Sync Clients — REQUIRED
# For Graph, set Identifier/Provider to graph and drop ExchangeType.
# For on-premise Kerberos, set ExchangeType=2 and use OnPremUrl / OnPremDomain / UserName / Password (not ExchangeOnPremUrl).
EventSyncClients__0__Identifier=ews
EventSyncClients__0__Provider=Ews
EventSyncClients__0__Settings__ExchangeType=1
EventSyncClients__0__Settings__TenantId=yor-exchange-tenant-id
EventSyncClients__0__Settings__AppId=your-app-id
EventSyncClients__0__Settings__ClientSecret=your-client-secret
 
EventSyncClients__1__Identifier=dav
EventSyncClients__1__Provider=Dav
EventSyncClients__1__Settings__BaseUrl=your-nextcloud-base-url
EventSyncClients__1__Settings__ServiceUsername=your-nextcloud-admin
EventSyncClients__1__Settings__ServicePassword=your-nextcloud-password
EventSyncClients__1__Settings__SharedSecret=your-shared-secret
 
EventSync__Pairs__0__SourceClientId=ews
EventSync__Pairs__0__TargetClientId=dav
EventSync__CalendarPriorityOrder__0=ews
EventSync__CalendarPriorityOrder__1=dav
 
# Full Synchronization Configuration
Service__FullSyncConfiguration__ProcessAttachments=true
 
# Sensitive Synchronization Configuration
Service__SensitiveSyncConfiguration__SensitiveTitle="Busy"
Service__SensitiveSyncConfiguration__SensitiveCategory="Nextcloud Sync"
 
# Logging (Serilog)
Serilog__MinimumLevel__Default=Error
Service__LoggingConfiguration__LogsOutput=3
Service__LoggingConfiguration__LogDirectoryPath=
Service__LoggingConfiguration__LogFileSizeLimit=50
Service__LoggingConfiguration__LogFileAmountLimit=20

Full Config for Binary deployment (Multi-Instance)

# Service Configuration — edit these three per-instance
Service__IsPrimary=true
Service__DeploymentType=1
Service__AspNetCoreUrl="http://localhost:5001"
Service__DefaultWorkerName="SendentWorker-1"
 
Service__BatchLimit=50
Service__WorkerIntervalSeconds=60
Service__BatchSaveSize=100
Service__StartWeekend=6
 
Service__SyncMode=1
Service__SyncType=0
 
# Database Configuration
DatabaseConfiguration__DatabaseType=2
DatabaseConfiguration__DatabaseEncryptionKey=YourSuperSecretKey123!
DatabaseConfiguration__ConnectionString=YourDatabaseConnectionString
 
# Exchange Configuration
Service__ExchangeConfiguration__ExchangeAdminFile=
 
# Sync Clients — REQUIRED
# For Graph, set Identifier/Provider to graph and drop ExchangeType.
# For on-premise Kerberos, set ExchangeType=2 and use OnPremUrl / OnPremDomain / UserName / Password (not ExchangeOnPremUrl).
EventSyncClients__0__Identifier=ews
EventSyncClients__0__Provider=Ews
EventSyncClients__0__Settings__ExchangeType=1
EventSyncClients__0__Settings__TenantId=yor-exchange-tenant-id
EventSyncClients__0__Settings__AppId=your-app-id
EventSyncClients__0__Settings__ClientSecret=your-client-secret
 
EventSyncClients__1__Identifier=dav
EventSyncClients__1__Provider=Dav
EventSyncClients__1__Settings__BaseUrl=your-nextcloud-base-url
EventSyncClients__1__Settings__ServiceUsername=your-nextcloud-admin
EventSyncClients__1__Settings__ServicePassword=your-nextcloud-password
EventSyncClients__1__Settings__SharedSecret=your-shared-secret
 
EventSync__Pairs__0__SourceClientId=ews
EventSync__Pairs__0__TargetClientId=dav
EventSync__CalendarPriorityOrder__0=ews
EventSync__CalendarPriorityOrder__1=dav
 
# Concurrency Configuration
Service__ConcurrencyConfiguration__MaxParallelProcessingUsers=1000
Service__ConcurrencyConfiguration__MaxUsersPerAdmin=100
 
# Full Synchronization Configuration
Service__FullSyncConfiguration__ProcessAttachments=true
 
# Sensitive Synchronization Configuration
Service__SensitiveSyncConfiguration__SensitiveTitle="Busy"
Service__SensitiveSyncConfiguration__SensitiveCategory="Nextcloud Sync"
 
# Logging (Serilog)
Serilog__MinimumLevel__Default=Error
Service__LoggingConfiguration__LogsOutput=5
Service__LoggingConfiguration__LogDirectoryPath=
Service__LoggingConfiguration__LogFileSizeLimit=50
Service__LoggingConfiguration__LogFileAmountLimit=20

Next Step

Deploying via Docker (Single Instance)