improve slow microsoft query

[vjeffrey]

 microsoft.users.any(userPrincipalName == /emergency/)
 emrgID = microsoft.users.where(userPrincipalName == /emergency/).map(id)
 microsoft.rolemanagement.roleDefinitions.where(displayName == "Global Administrator").all(assignments.any(principalId == emrgID))

this query has been found to be very slow in large environments. we need to investigate how to improve it.

[vjeffrey]

two possible ways to speed this up:

• allow fetching of users by userPrincipalName so we don't have to use a where clause there
• allow fetching of role definitions by display name so we don't need to use a where clause there

[vjeffrey]

being able to query

 emrgID = microsoft.users(userPrincipalName == /emergency/).map(id)
 microsoft.rolemanagement.roleDefinitions(displayName == "Global Administrator").all(assignments.any(principalId == emrgID))

would make this easier