After an update to Dynamics CRM 126.96.36.1999 it happens that the “From” field of the email entity is permanently disabled / locked on all forms, even in the workflow-editor.
It seems as the updates deletes a part of the fieldsettings. But you can easily restore the settings.
- Create a new solution with the “From” field of the email entity in it.
- Export the solution, unzip it and open the customizations.xml.
- Find the tag:
- Replace it with:
<LookupTypes> <LookupType id="00000000-0000-0000-0000-000000000000">8</LookupType> <LookupType id="00000000-0000-0000-0000-000000000000">2020</LookupType> </LookupTypes>
- Save the customizations.xml and zip it again into the solution file.
- Upload and publish the updated solution.
All credits go to the people of the following threads. They found and tested the solution.