Exchange Cutover Migration - Sync Errors

Question

I just started a new Migration Batch where a few mailboxes failed because of below:

The proxy address "SMTP:*** Email address is removed for privacy ***." is already being used by the proxy addresses or LegacyExchangeDN. Please choose another proxy address.

I have run commands with onprem Exchange Server to find any object containing this email address but only the mailbox objects were returned. How can I resolve this? Do I need to do anything before trying a 'Resume' in Migration Batch. Ideally I don't want to use PST migration so looking for a solution - in addition these mailboxes are members of some groups that consequently failed due to the fact the mailboxes failed.

Run Get-Recipient | where {$_.EmailAddresses -match "*** Email address is removed for privacy ***"} | fL 
Name, RecipientType,emailaddresses

I see this https://community.office365.com/en-us/f/156/t/288722 but not sure if this is what I should do.

Mailbox is not created but User is in O365.

Answer 1

Hi Erick,

I deleted the MB then deleted a few mailboxes we did not need then created a new MB. Now I am seeing more errors than before, and mostly say the following? Why would this happen if this was one of the successful mailboxes from the first time around?!?

Error: ProvisioningFailedException: Failed to update one of the recipient properties. --> Couldn‎'t find object "/o=NT5/ou=55227cfe528b2143a57b561ed1de7614/cn=3ad8bc406759f44f944f6028abac67a7". Please make sure that it was spelled correctly or specify a different object.

I need assistance on this asap as we are expecting to migrate Friday for customer.

Answer 2

Hi David,

Thanks for your information.

About your new errors, here are some steps you can check to troubleshoot this issue:

(1) Navigate to User properties > Check if any disabled User object is granted Send on Behalf of Permission on his mailbox and accordingly remove disabled object from there.

(2) In some case if you have assigned delegates and that object is disabled or no more in Active Directory, You'd expect to this error. Therefore, remove the entry from 'PublicDelegates' attribute on User Object using Adsiedit.

After that, please try deleting the problematic mailboxes in cloud and create the batch again.

Best Regards,

Erick

Answer 3

Hi David,

You can do it. The steps are fine. Since PowerShell cannot get any results, the issue is wired based on the error message. I will also consult it.

Please let me the result after you run the batch again.

Best Regards,

Erick

Answer 4

Hi David,

About “Are there any issues with doing this?”, the answer is no. As I mentioned above, the new migration batch will not sync data previously uploaded to Office 365. You can try re-running the batch or creating a new one.

Meantime, do you have any users under the Deleted users in Portal? If so, please check it at your convenience.

Best Regards,

Erick

Answer 5

hi david,

based on the error messages, the email address should be used already.

to narrow down the issue, could you please run the following exchange online powershell cmdlt? here are the steps:

1. connect to exchange online using remote powershell

2. type in the commands below:

get-recipient * | where {$_.emailaddresses -match "*** Email address is removed for privacy ***"} | select identity, displayname, recipienttype

after that, please follow the steps below to upload the results of screenshots:

(1) click use rich formatting on the bottom of this thread->click insert image as the picture shows.


(2) on the pop-up window, click browse to select the screenshot. after it is uploaded, click insert.

best regards,

erick