O365 Setup - A few questions

[FoxHound]

Hello all,

 

So I am powering through the steup of our O365 tennant. We are using AAD Connect to sync users and passwords with writeback.

 

We currently have exchange which is managed by our LEA and we will be moving to O365, but not migrating - a greenfield email setup. While we move over, I am looking to run the two mail systems in parralel for a few weeks however I am concerned about the affect on both Azure and our on site AD.

 

I initially tried a few test accounts and one live account as a pilot and added them into 365 (filtered by a test group). I found that mailboxes were not created (a message stated waiting for the mailbox to be migrated). I have subsequently altered the sync rules not to sync the mailbox guid attribute - and exchange online subsequently created a mailbox

 

Can anyone see any potential issues, as I am concerned about all the other exchange and email attributes which ARE still being synced.

 

In addition, is it normal that the mailboxes appear as '[email protected]' in exchange admin center - even though we are using a custom domain ? The custom domain is working, and the accounts do get email address in the custom domain.

 

Help and advice would be greatly appreciated.

[mikkydoos]

In addition, is it normal that the mailboxes appear as '[email protected]' in exchange admin center - even though we are using a custom domain ? The custom domain is working, and the accounts do get email address in the custom domain.

 

If you haven't yet completed the DNS setup for your 'custom' domain O365 won't assign that domain to sync'd users. You need to migrate that or another domain name first.

Also for all migrating AD users, they require that the domain name in AD matches the one in the cloud. You can accomplish this with creating a domain suffix in AD and selecting the appropriate domain on the users Account tab.

 

Users who require an alias, in addition to supplying the correct domain, the ProxyAddress needs to be set on the Attribute Editor tab.

Enter two entries:

 

Main account should read:

 

SMTP:[email protected]

 

Alias(es) shoudl read:

 

smtp:[email protected].

 

Again both domains need to be set up and verified in O365 if they want to send mail from that alias, otherwise the MX record of the 2nd domain needs to be amended to point to O365..

 

Hope this helps