Posts tagged ‘o365’
How to migrate the AAD Connect to a new Server
For those who running AAD Connect to Synchronize their On-Premise AD , may come across a requirement to upgrade the OS on the AAD connect server. In this situation , the safest approach would be to install a new server with latest OS version and then migrate the AAD connect with the below mentioned steps safely without facing lengthy outages.
- Prepare a new server with the Operating System.
- Install the AAD Connect (Preferably the same version as the existing or the latest version available).
- Now , Prior to proceed with the migration you need to ensure two things.
– Take a backup of existing configuration using the AAD Connect –> View or Export configuration
–>Click on Export Settings. This will create a json file in X:\Program Data\AADConnect. (Copy it to the new server)
– Secondly use the Azure AD Sync Configuration Documenter to collect the existing configuration in HTML format.(https://github.com/Microsoft/AADConnectConfigDocumenter/releases) . The Installation instruction can be found in https://github.com/Microsoft/AADConnectConfigDocumenter/wiki.
Thereafter , proceed with the installation of AADC on the new server , select the Customize option (instead of Express) –> Import Synchronization settings ,and import the configuration using the json filed copied in the above step and press Next.
In the last screen of the AADC Installation wizard , select the below options.
– Start the synchronization process when the configuration completes.
– Enable staging mode.
Now , you using the AADC configuration documenter capture the settings on the new AADC server. Then run the below command to compare both the configuration.(Refer the wiki for instructions) after copying both the files in the same location.
AzureADConnectSyncDocumenterCmd.exe “AADC-SERVER-OLD” “AADC-SERVER-NEW”
After reviewing the output and confirming the configuration are identical proceed with the final steps in the migration.
– Enable the staging mode on the Old AADC server.(by running the AADC – Tasks- Configure Staging mode).
– Disable the staging mode on the New AADC server.
– Perform a test and confirm the synchronization is working as expected.
– Uninstall the AADC from the old server and proceed with the decommission.
How to create an O365 Mailbox when there is no On-Prem Exchange Servers.
In some cases the IT department decomission the On-Prem Exchange Server after migrating the mailboxes to O365. (For detailed steps for uninstallation of Exchange Please refer my previous article : https://vands.pro/2018/11/06/how-to-decomission-on-prem-exchange-server-after-migrating-the-mailboxes-to-o365/.
OK, Coming back to mailbox creation ; All these steps need to be done in the ADUC
+ Create an AD User.
+ Type the email address in the email field.
+ Go to the Account Tab and select the correct domain name.
+ In the Attributes Editor modify the two parameter’s as below
proxyAddresses: SMTP: myemail@email.com
targetAddress: SMTP: myemail@companyname.onmicrosoft.com
+ Either perform a manual sync or wait for the next schedule.
+ After the Sync is completed you will be able to see the user in O365 Portal and need to assign the Exchange License to complete
the mailbox creation.
Credits: https://c7solutions.com/2014/07/creating-mailboxes-in-office-365-when-using-dirsync
How to Decomission On-Prem Exchange Server after migrating the Mailboxes to O365
Few weeks ago, we had project to migrate the Exchange 2010 Mailboxes to O365. After the migration completed we had to remove the On-Prem Exchange Servers(Even though it is not a supported scenario from Microsoft , still you could do this.) This will lead you to to adopt non standard methods when creating new mailboxes(Refer my post https://vands.pro/2018/11/06/how-to-create-an-o365-mailbox-when-there-is-no-on-prem-exchange-servers/ for detailed steps). Also if you still needed an Exchange Server in your premises to avoid complication you could contact MS O365 Support to obtain a free Exchange Hybrid License and install an Exchange Server.
Coming back to the original goal of this article you need to follow the below steps if you have decided to remove the Exchange Servers; Also note that uninstallation of Exchange will not impact the O365 mailboxes in any manner.
+ By this time you should have changed the MX and related DNS records on
the on-prem DNS and Public DNS Servers.
+ Set the AD Internal URL to null
Get-ClientAccessServer | Set-ClientAccessServer
-AutoDiscoverServiceInternalUri $Null
+ Then disable the AD Sync(Temporarily)
Set-MsolDirSyncEnabled -EnableDirSync $false
(Get-MsolCompanyInformation).DirectorySynchronizationEnabled – To
view the current status.
+ Open Exchange Shell in one of the Exchange Server(uninstallation should
be started in the order of MBOX,CAS,HUB & Edge)
+ Remove default Public folders
Get-PublicFolder “\” -Recurse -ResultSize:Unlimited |
Remove-PublicFolder -Recurse -ErrorAction:SilentlyContinue
+ Remove system Public folders
Get-PublicFolder “\Non_Ipm_Subtree” -Recurse -ResultSize:Unlimited |
Remove-PublicFolder -Recurse -ErrorAction:SilentlyContinue
+ Remove Offline Address Book
Get-OfflineAddressBook | Remove-OfflineAddressBook
+ Remove send connectors
Get-SendConnector | Remove-SendConnector
+ Remove Public Folder Database
Get-PublicFolderDatabase | Remove-PublicFolderDatabase
+ + Remove Arbitration Mailbox
Get-Mailbox -Arbitration | Disable-Mailbox -Arbitration -DisableLastArbitrationMailboxAllowed
+ Disable / Delete All non migrated Mailboxes
Get-Mailbox | Disable-Mailbox
+ Open CMD as Administrator and Go to the bin folder in the Exchange Installation Folder in your C: drive(Depend on your environment)
setup.com /m:unistall.
+ Once all the Exchange Roles are uninstalled disjoin the servers from the AD.
+ Re-run the AD Sync Tool and remove the Tick on Exchange Hybrid Configuration.
+ Re-enable the AD Sync
Set-MsolDirSyncEnabled -EnableDirSync $false
Credits: https://www.itpromentor.com/remove-hybrid-keep-sync/
Good Luck Guys.
Hope you like it.. 