How to configure a requester to multiple accounts and its sites

How to configure a requester to multiple accounts and its sites

 we are using sdp msp 8202. we have a customer, who logs the cases for multiple accounts and its sites. we need to provide single login credentials to them to log the cases. is there any way to configure the same.
Please let me know, if this functionality available.

Thanks in advance
Pradeep Kumar K




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