Remove a mobile device from your Exchange account

by Bharat Suneja

Most users switch to new mobile devices or add new ones. Over a period of time, your Exchange mailbox may have quite a few mobile devices. If you’re not using a smartphone or other Exchange ActiveSync (EAS) device (including Windows 8/Windows RT tablets, Apple iPad or other iOS devices), you can remove it from your account using Outlook Web App. You can also wipe an existing mobile device, as long as it’s still active and syncing mail.

Office 365 and more than 10 ActiveSync devices

If your mailbox is in Office 365, it has a limit of 10 ActiveSync device partnerships at the same time. If you keep accumulating device partnerships and not remove old devices that you no longer have, you’re prevented from adding more than 10 devices. When trying to add the eleventh ActiveSync device, you get an error message on the mobile device. You also continue to get daily email alerts with the subject: “Error with your mobile phone partnership” with instructions to remove existing ActiveSync devices from your account.

Screenshot: Email alert sent by Exchange Online when you try to add more than 10 ActiveSync devices to a mailbox
Figure 1: Office 365 prevents you from adding more than 10 ActiveSync devices to a mailbox and alerts you when you try to add more devices.

To remove an Exchange ActiveSync device from your account:

  1. Go to Options > See all options

    Screenshot: Select 'See all options' from Outlook Web App
    Figure 1: Select See All Options from Outlook Web App

  2. Select Phone. The Mobile Phones tab shows a list of all Exchange ActiveSync devices connected to your account, including mobile phones and tablets.
  3. Select the device you want to remove and click Delete. The Last Sync Time field shows you the last time a device synchronized.

    Screenshot: Removing a mobile phone using Outlook Web App
    Figure 2: Removing a mobile phone from your Exchange account (larger screenshot)

Before disposing off a phone, make sure you remove your data from the phone. You can use the Wipe Device option fromt Outlook Web App to wipe device data. Additionally, most mobile phones and other mobile devices have an option to reset the device to factory settings.

{ 13 comments… read them below or add one }

Patrick Edwards December 31, 2015 at 11:27 pm

Hi. How do I remove the device if I know longer own it?


Ed January 17, 2016 at 11:19 pm

As described above. You don’t need to do anything on the device itself.



athletic February 14, 2016 at 3:09 am

when i removed my phone from Wipe Device i lose all my file in my phone :( is there are any way to reback please??


Yannick March 14, 2016 at 10:46 am

I have 100 device, do you know how for deleted all, and no one by one ? It’s really long for delete !



Zeeshan March 30, 2016 at 5:46 am

Thanks for sharing valuable information.

I have been receiving same emails when i try to add my email exchange to another device.
For few years i have been changing devices and setting them up with exchange accounts. Thu i do bring those devices to factory defaults once it’s time to let go of them.
I have checked my outlook web setting, and it only shows me 01 phone is partnered, i tried adding another device but keep getting same messages that i am partnered with 10/10 accounts.
Please help.


Ryan June 28, 2016 at 11:06 am

I received a message saying I have 4 or more partnerships and to log into outlook to remove the devices but my only problem is I have strictly been using the Mail app through my mac book pro. I have no idea how to access anything else. Does anyone have any ideas or recommendations?


Jeff August 3, 2016 at 12:56 pm

I removed these via our server and checked it on the web app and it says there are no devices synced to an account. Yet if I try to set up a new account on any device (tried an iPad, an Android phone and tablet) it says that the device maximum has been reached. Any help?


Bharat Suneja August 3, 2016 at 2:43 pm

>>I removed these via our server
Is this for Exchange Server (on-premises)?


Sharon August 21, 2016 at 4:15 am


My web Xmail only shows the “text messaging” tab, but does not show the “Mobile phones” tab. How can I enable the missing tab? :-(



robert moran October 31, 2016 at 7:30 am

how do you login to Outlook Web App and do I use my regular email address and password?


wes aycock December 2, 2017 at 5:16 am

how do a remove devices from my company account. when i try to log in using company email it wont let me into account. im not the admin .do i use the phone number to setup account or to log in , to be able to remove devices. microsoft is pain in the ass. company doesnt have gmail or other .com


Matt Rueger February 28, 2019 at 6:33 am

The tab to remove mobile accounts is not visible. The only tab available under phone is text messaging.


Bharat Suneja February 28, 2019 at 12:49 pm

Office 365/Exchange Online or on-premises? If the latter, what version of Exchange Server?


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