1-Create an account for the MSCRM Sandbox, like CRMSandboxSvc.
2-Create unique accounts for each MSCRM deployment group to limit the scope of rights for the account across the domain systems.
3- Make sure that the account has a secure password.
4- Ensure the password for this account is not set to expire, or that a process is in place to manage the password changes if you have a password expiration policy. Add the CRM Sandbox service account to the Performance Log Users group on the CRM Sandbox servers.
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