Post Upgrade Dynamics CRM Sales Error

Issue Description:

Error Text:

"Assembly content:(Microsoft.Dynamics.Sales.Plugins, Version=9.0.1.0) does not match the expected assembly identity."

Error Cause:

Dynamics CRM on premises server update has been completed but the DB version was not upgraded successfully.

Issues Caused by Error:

Creation of new records in all entities fails (OOTB & Custom).

Error Resolution:

Solution #1:

  1. Navigate to the Dynamics CRM deployment server.
  2. Open the Deployment Manager with a Deployment user account.
  3. Right click the organization and "Update".
Solution #2:
  1. Navigate to the Dynamics CRM deployment server.
  2. Navigate to the following directory; "C:\Program Files\Dynamics 365\Server\bin\assembly".
  3. Backup the DLL, "Microsoft.Dynamics.Sales.Plugins" somewhere safe.
  4. Replace the DLL with the same DLL from a previous version.
  5. Run Powershell or CMD as Admin to perform IISReset.

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