Event ID - 1003

Event Id1003
SourceMSExchange Message Security
DescriptionNo valid Transport Layer Security (TLS) certificate was found. Microsoft Exchange can't update the Active Directory Application Mode (ADAM) credentials.
Event InformationAccording to Microsoft :
Cause :
This Error event indicates that a valid Transport Layer Security (TLS) certificate was not found on the server where this event occurs. A TLS certificate is required for a Hub Transport server to use and update the EdgeSync replication account credentials.
Resolution :
To resolve this error, do one or more of the following:
1.Create a new TLS certificate for the server and then resubscribe the Edge Transport server. You do not have to remove the Edge Subscription to resubscribe. Run the New-EdgeSubscription cmdlet in the Exchange Management Shell on both the Edge Transport server and the Hub Transport server to overwrite the existing Edge Subscription.
2.Review other related Error and Warning events in the Application log. These related events may help you find the root cause of this error.
Reference LinksEvent ID 1003 From Source MSExchange Message Security

Catch threats immediately

We work side-by-side with you to rapidly detect cyberthreats
and thwart attacks before they cause damage.

See what we caught

Did this information help you to resolve the problem?

Yes: My problem was resolved.
No: The information was not helpful / Partially helpful.