REST API call returns 501 objects; however, more were expected (4261411)

Increase the value of the REST_MaxObjectCount registry variable to set a new global limit.  The value can be increased with the following steps:

1. Navigate to the Manage Registry Variables dashboard (Administration | Rules& Notifications | Manage Registry Variables).
2. Search for the REST_MaxObjectCount registry variable.
3. Click on the REST_MaxObjectCount registry variable and select "View and Edit Details".
4. Click the Change button on the "Global Default" row.
5. Enter a value higher than the number of objects you need to retrieve in the "Enter desired value" field, and then click Finish.

Alternatively, the maxObjectCount URL parameter will allow to override the limit above for the current call.