Hybrid Migration from Exchange 2016 to office365

Anonymous
2018-02-15T08:36:09+00:00

Hi MS,

I am in the planing phase of doing 10 users Pilot Hybrid migration to office 365 in E3 plan using our Volume licence.

We have two 2016 exchange servers running in DAG

We also have email filtering done via Mimecast and for purpose of this exercise i want to leave email filtering to mimecast and not use EOP.

I want to get a clear idea of exact steps I need to take to configure this.

However, before I do anything i want to make sure it does't affect our SMTP or any other users from reading tons of articles and some previous experience with office 365 this are the steps i think needs to be performed.

  1. use exchange server deployment assistance

 - check prereq - all good

My questions  Questions are 

On step 14

If i add this TXT record this will not affect any mail flow this is purely for domain verification? 

Question 2

on the step 15 -29 here 

https://technet.microsoft.com/en-us/exdeploy2013/Checklist?state=3229-W-EwAIAAAAQAAAAAEAAAAAACAAAABEaAOFAAA~

will that affect any existing mail flow or existing connectors as we have few there

Question 3 

overall understanding is mailflow will still be going through exsting exchange server and other 240 users will not be affected and not other server or services such as smtp, scanning service will be affected due to this. 

We never need to change MX records and we don't have to make any changes to mimecast?

Please clarify these ASAP, would be really appreciated.

Microsoft 365 and Office | Subscription, account, billing | For home | Windows

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  1. Anonymous
    2018-03-29T11:27:28+00:00

    Hi Roy,

    If I understand correctly, generally, there are two permissions: “Send on behalf” and “Send As”. If you use “Send on Behalf”, recipients will see “someone on behalf of someone”. If you don’t want users to see it, you can use the “Send As” permission. Here is a reference:

    https://support.office.com/en-us/article/give-mailbox-permissions-to-another-user-in-office-365-admin-help-1dbcf12f-a9de-4d1d-b0b3-a227f8a736d8

    I suggest you do it after finish migration. Since you will remove on-premise Exchange servers, I’m not sure whether users are all pure cloud users. To avoid other community member’s confusion, one thread has one issue or one question. If you are the pure cloud users and try the steps in the link above, please post a new thread in our forum (Office > Outlook > system > Office 365 for Business) with detailed permissions. Our engineers will focus on the new thread to help you.

    Your understanding is highly appreciated.

    Best Regards,

    Erick

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  2. Anonymous
    2018-03-29T06:48:48+00:00

    Thanks Erick,

    Since we have moved to office 365 now we are having problem with one user sending calendar invite on behalf of another user. PA from CEO

    But CEO doesn't want the recipient to see the message "on behalf off" message anywhere on that invite. He wants to make it looks like it came from him competently even though his PA has send that invite from her outlook. 

     In outlook older versions when you created the calendar entry you had the option to choose "From option"

    But in 2016 the from option is there but you can't select on it or has a drop down.  PA has full access to CEO's mailbox under delegation but still 

    Bottom line PA needs to send calendar invite as CEO from her mailbox without any "on Behalf of" and it needs to look like it has come from CEO.

    If office 365 and office 2016 there seems to be no ability to do so. Can you confirm? It this feature is not available in office 365/2016 evnironement? 

    Thanks

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  3. Anonymous
    2018-03-27T07:13:07+00:00

    Hi Roy,

    Thanks for your explanation.

    The answer is yes. You can delete them from the DAG. About deleting anything, we need to confirm it again and again. Because some steps are not reverted. Your understanding is highly appreciated.

    Best Regards,

    Erick

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  4. Anonymous
    2018-03-26T14:48:35+00:00

    Hi Erick,

    Yes, i think we are getting confused.

    Hybrid is only for now, we will be doing full migration to cloud so no on prem server will exist once we migrated all 350 users.

    I understand we still need to have one on-prem exchange just for directory sync but no mailboxes will be on the local server.

    So my question is I want to delete those 40 mailboxes which are already been migrated to office365. I used different batch files to migrated them so 40 users are all from different batches. 

    I want to deleted only those 40 users for now from local on-prem 2016 exchange so we don't have a local copy of those mailboxes on our local DAG storage .

    Does that makes it more clear?

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  5. Anonymous
    2018-03-26T09:37:59+00:00

    Hi Roy,

    Since you use the Hybrid remote migration, the mailboxes are migrated to cloud when they are finished and there are only mailuses on your on-premise Exchange servers. Do you want to delete them under the mailboxes page in the EAC? If so, we don’t recommend you do it. If not, please let me know where you want to delete. To avoid any misunderstanding, it is very important for us and you to check it.

    May I know whether you use the same batch to migrate these 40 users and other 350 users?

    Best Regards,

    Erick

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