System mailbox problem for Exchange

Moving system mailboxes to Exchange 2016
ref link:  https://technet.microsoft.com/en-us/library/mt441791(v=exchg.150).aspx

Check if the HomeMDb is set for that system Mailbox if not just set the HomeMdb pointing to any of your Exchange 2010 DB and then move the Mailbox

reff- https://www.experts-exchange.com/questions/28269745/Exchange-2010-Attendant-homeMDB-Attribute-Mailbox-Database-0365048811.html

You will have to select your Mailbox

Dear Pradiip and Fox

I found that problem is related to systemmailbox which is remnant of old 2003 exchange server. I moved from 2003 to 2010 3-4 years ago and I can remember that it was quite painfull with several problems during swing migration.

Now when I tried to move to 2016, it is easy, however obviously E2016 searched registry and found that remnant mailbox. See the picture, the only reference which I found in registry is on picture. When I listed system mailboxes of working E2010 those are different.

So what I did is simply I deleted that registry key and all is OK.

Should I test something else?

i have that scenario uploaded in ESX server so that I can play safely in any way, and after I will feel OK, I will proceed on to migration in production environment.

Thanks

V
2018-08-13_11-56-44-SystemMailbox.jpg

It should be okay

Just check if OAB is working fine, I am sure it would be alos runt get-mailbox -arbritation and see if its giving waking or error