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MQ_ERROR_UNSUPPORTED_CLASS
MQ_ERROR_UNSUPPORTED_CLASS: the AD DS object is not a class that MSMQ supports for this operation
MQ_ERROR_UNSUPPORTED_CLASS (0xC00E0093) identifies a specific boundary: the AD DS object is not a class that MSMQ supports for this operation. Keep it separate from neighboring errors that may occur in the same product but represent a different lookup, state, trust, or transport decision.
Evidence to capture
Capture the distinguished name, objectClass values, requested MSMQ operation, schema/version context, and the query that selected the object. A reachable directory can still return the wrong kind of object.
Corrective test
Repeat with an object of the documented MSMQ class or correct the directory lookup so it resolves the intended object. Do not recreate the whole MSMQ installation for a class mismatch. Preserve the original identifiers while testing; if another HRESULT appears after this boundary is fixed, treat that value as the next-stage result.
Technical references
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