Ax error " A user session on the server could not be created. Try to start the client again. If the problem continues contact Ax Administrator

Cause:
AOS has no access to createusersessions stored procedure in the database.
Even there will not be any log in Event Viewer for this issue.

Occurrence :
Whenever C:drive of AOS server gets full then this will occur.

Resolution:
Clear the C: drive at-least to 2 GB to run the application.
Best way is to shirk the SQL databases.

Regards,

The user or group name 'DmainName\UserId' is not recognized in AX 2012 R3

Hi,

When  you restore the AOS database from 1 environment to another where there is no relation of domain or user then you will encounter above mentioned error nduring report server validation / creation of folder / making default.

Reason: Existence of records of parent server in the table SysServerSessions.  though you added the new server details as record in SQL level, you needs to delete those records too.

Hope this will solve your error.

Thanks,