In the MRE what happens to the connections for domain and My Reports when you change the id of a user ? If I have a user APBRS who has access to several domains and has created several "My Reports" and then I need to change his id to BS82734, what happens .... ? Can this be done....?

From IBI:

You should be able to change the userid without it affecting anything
inside
the Managed Reporting. However, you might want to make the change for this
user inside the User Administration tool since it will make the change for
any file calling that old userid in the files inside the Basedir directory.
It is not suggested to make changes manually.

Please let me know if you have any additional questions or problems.

Regards,
Monica Vinasco
Information Builders
Customer Support Services