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Configure and Enable Atlas Device Sync
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Overview
You can configure and enable Atlas Device Sync via the App Services UI, Realm CLI, or the Atlas App Services Admin API. You can update an existing configuration in the same way. If it is your first time enabling Device Sync, the UI is a great choice because it walks you through the required steps.
You might want to alter your Atlas Device Sync configuration after you have already enabled Device Sync. You can update a configuration using the same procedure as enabling Device Sync in the first place. If you're using Flexible Sync mode, you can update your configuration without needing to terminate and re-enable Sync.
If you're re-enabling Device Sync after pausing or terminating it, refer to Resume or Re-Enable Device Sync.
If you are using the older Partition-Based Sync mode, refer to Alter Your Partition-Based Sync Configuration.
Prerequisites
While you are configuring Device Sync, you must define the data access patterns and rules for your App. If you haven't already decided how you want to configure your data model and access Device Sync, see:
Important
Before defining sync rules and enabling sync, you must specify at least one valid schema for a collection in the synced cluster unless you are using Development Mode.
At a minimum, the schema must define _id and the field(s)
you intend to use as your queryable fields.
For more details on how to define a schema, see Enforce a Schema.
Procedure
Note
Flexible Sync Prerequisites
Enabling Flexible Sync in Your App Services Application requires a non-sharded MongoDB Atlas cluster running MongoDB 5.0 or greater