IMCEAEX-ADCDisabledMail errors on Exchange Transport Server

We are getting 9217 error on one of exchange HUB/Transport servers recently. I did cleanup of LegacyExchangDN in AD but still getting the error. We have three Hub/Transport Servers but only one of them populated with 9217 error. Much appreciate if anyone can share how to fix this issue. Thanks !

https://social.technet.microsoft.com/Forums/en-US/6fee54f2-4345-471b-bb62-04a7d75bc02e/msexchangetransport-9217-imceaexadcdisabledmaildomaincom?forum=exchange2010

Log Name:      Application
Source:        MSExchangeTransport
Event ID:      9217
Task Category: Categorizer
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      ExchangeHUB1
Description:
More than one Active Directory object is configured with the recipient address IMCEAEX-ADCDisabledMail@domain.com. Messages to this recipient will be deferred until the configuration is corrected in Active Directory.

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