Our Splunk is Active Directory integrated. I have a user overseas who is stating that he cannot take certain actions (schedule real time searches). Other users with identical groups can. Is there a way for me to run as this user without having his password?
No, but you can create a non-AD local user, give that user the same roles and see if between the 2 of you sharing that login, you can reproduce the problem.
Assuming that all settings are done at role level, you could just create native test splunk user with same role as the user having issues and then login as that test user to validate role level conf and access. Tested method.
Since the term "identical groups" is ambiguous between AD groups and splunk roles, please try the following and check roles for your user against one such person with "identical groups".
| rest splunk_server=local /servicesNS/-/-/authentication/users count=0 | table title email realname roles type
If the roles are identical, and the AD groups are identical, then check whether the user already has some rt search running constantly that means he can't do ANOTHER one or be over his limit.
Other than that, have the user send you a screen shot of the relevant error message and the exact time of day of the attempt.