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Will Autodiscover reconfigure an existing Outlook profile in a cutover migration?

Posted on 2015-02-06
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Last Modified: 2015-02-11
We are performing a cutover migration from Exchange 2007 to Office 365.
Currently, there is no autodiscover DNS record configured.

If we setup the standard CNAME record...

AUTODISCOVER     AUTODISCOVER.OUTLOOK.COM

...will the user's Outlook profiles reconfigure themselves or will it be necessary to setup a new profile for each user?

Thank you for your time in advance.

KB
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Question by:K B
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6 Comments
 
LVL 17

Expert Comment

by:Ivan
ID: 40593576
Hi,

i'm not shure about this one, but I know that when you are doing cross forest migration, with autodiscover configured, after mailbox is moved to new exchange outlook will detect it, and reconfigure automatically.

Guess this will be the same, but not shure.
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LVL 8

Author Comment

by:K B
ID: 40594247
So I can simulate this with a HOSTS file entry but AutoConfiguration only seems to occur if I modify Logon Network Security under the Security Tab to Anonymous.

Will this occur when we make the production cutover with the proper CNAME record?

I am fooling Outlook to use autodiscover.MyDomain.com by pointing it to the IP for autodiscover.outlook.com (with a HOSTS file entry) so I am hoping this is why I have to change Logon Network Security to Anonymous but I need to be completely sure.
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LVL 4

Expert Comment

by:Praveenraj04
ID: 40594354
Hi KB,

You will need to configure outlook profile separately. Outlook does not know the change so you need to install Office 365 autodiscover in your client machines.  It will prompt to enter the details when reconfiguration happen.

Thanks,
P. Praveen Raj
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LVL 8

Author Comment

by:K B
ID: 40594374
Thank you .... I am not following your reply.
specifically,
you need to install Office 365 autodiscover in your client machines
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LVL 8

Accepted Solution

by:
K B earned 0 total points
ID: 40594839
This just won't work...

Only in a Hybrid migration does the existing profile work - but still ActiveSync users must create a new profile.
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LVL 8

Author Closing Comment

by:K B
ID: 40602758
Not possible in this case.
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