000063 : Cannot grant or revoke privileges to database user <value>.

Description

Privileges cannot be granted to or revoked from the specified user.

Solution

Privileges cannot be granted or revoked under all circumstances. For instance:

• If the user is a database server administrator or geodatabase administrator, he or she automatically has read/write permissions on all the datasets in the geodatabase; you cannot grant lesser permissions on a dataset—such as read-only—to this user.
• If a user was granted read/write permission at the geodatabase level, he or she automatically has read/write permission on the datasets in that geodatabase. Again, you cannot change that user's dataset permissions to read-only or none.
• If a user has read-only geodatabase permission, you can grant that user read/write permission to specific datasets.
• If a user's geodatabase-level permission is none, you can grant that user read-only or read/write permission to any dataset in the geodatabase.

Learn more about granting and revoking privileges on datasets.