Event ID - 518

Event Id518
DescriptionUnable to complete an MTA command because the issuer does not have adequate permission. [valuevaluevaluevalue] (14)
Event InformationAccording to Microsoft:
Either your permissions must be upgraded, or someone with the required permissions must perform this operation.
You do not have the required permissions to perform this operation.
Reference LinksExchange (MSExchangeMTA)

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