Get coterminosity dates

Coterminosity is the capability to align new or renewed NCE seat subscriptions with the end date of active subscriptions or the end of the calendar month.

You can use this endpoint to get the possible end dates to use during creating NCE seat orders or when scheduling next term instructions.


Request Syntax:

Method Request URI

Request Parameters:

Name Type Required Description
OrganizationId int Yes Identifier of the organization
CustomerTenantId int Yes Identifier of the customer tenant
SubscriptionId int No Identifier of the subscription. Applicable to the schedule next term instructions scenario
TermDuration string Yes An ISO 8601 representation of the term’s duration. Supported values are: “P1M” for (1 month), “P1Y” for (1 year) and “P3Y” for (3 years).


If successful, the following json is returned in the response body..

  "CalendarMonthDate": "2022-08-31T00:00:00Z",
  "Subscriptions": [
      "Id": 1200,
      "PublisherSubscriptionId": "f39d8f51-ff2c-46b4-8435-84bf67f2a36c",
      "FriendlyName": "Common Area Phone",
      "TermDuration": "P1M",
      "EndDate": "2022-09-25T23:59:59Z"
      "Id": 1201,
      "PublisherSubscriptionId": "f40d8f51-ff2c-46b4-8435-84bf67f2a37c",
      "FriendlyName": "Dynamics 365 Team Member",
      "TermDuration": "P3Y",
      "EndDate": "2022-09-1T23:59:59Z"

Response success and error codes:

Each response comes with an HTTP status code that indicates success or failure and additional debugging information. Use a network trace tool to read this code, error type, and additional parameters.

Error Codes Description
200 Ok The request has succeeded.
400 Bad Request The request could not be understood by the server due to malformed syntax, missing required properties, properties that couldn’t be parsed according to their type (and length). It is a non-retryable error condition. The client should not repeat the request without modifications.
401 Unauthorized The request requires user authentication. If the request already included Authorization credentials, then the 401 (Unauthorized) status code means that authorization has been refused for those credentials. It is a non-retryable error condition.
404 Not Found The server has not found anything matching the request.