Error: CREATE TABLE permission denied in database ‘tempdb’ in dynamics AX 2012 R2.
Background of the issue: This issue appeared after login and navigating to any forms in Microsoft Dynamics AX.
Solution: When I checked, there are no proper rights to the guest account on the tempdb table. After providing db_ddladmin, db_owner, db_securityadmin roles to the guest user, issue got resolved.
Few of other bloggers suggested in comments, providing the same permissions to AOS service account will also resolve the issue.