If your DocumentsCorePack/AttachmentExtractor Service stopps every 30 days the problem might be that a sign-in frequency policy of 30 days (default setting) is set for the service user.
The sign-in frequency policy defines how often a user needs to sign in manually. For the service user it is recommended to change the sign-in frequency policy to a value of 365 days.
If you do not want to change the sign-in frequency for the service user, you could use an Application User instead. Details can be found here.
The following steps guide you through the process of creating a new policy for the service user and set the sign in frequency for the service user to 365 days in your Azure Active Directory.
Therefore navigate to “Microsoft Azure” http://portal.azure.com and look for the Azure AD Conditional Access:
Select the [New policies]-button.
This site will open. Now select the service user for which you want to create a different sign-in frequency policy.
Select on the right side the “Sign-in frequency”. We recommend 365 days.
In order to take over this setting, press the [Select]-button and the [Create]–button.
That’s it! We appreciate your feedback! Please share your thoughts by sending an email to firstname.lastname@example.org.