Articles on: Connecting Guides

How to allow user consent for Microsoft / Outlook / Office 365 - Need admin approval

The following guide aims to solve the problem of not being able to connect an Outlook / Office 365 account by using the 'Sign in with Outlook/Office 365' button.


This is the message related to this issue :



Pre requisites


To configure user consent, you need to be or to be assisted by a Global Administrator or Privileged Administrator role.


Step 1 : Allow user consent in Microsoft Entra ID


  1. Go Microsoft Entra ID and log in as a Global Administrator
  2. On the left menu, head to Entra ID > Enterprise Apps (if you don't find it in the menu, type "Enterprise Apps" in the search bar)
  3. Under User consent for applications, select Allow user consent for apps from verified publishers, for selected permissions to configure for all users
  4. Make sure to Save
  5. Enable Users can request admin consent to apps they are unable to consent to​
  6. Add users
  7. You should be prompted to a page "Request Permission" You have to request permission.
  8. Go to App permissions in Microsoft and approve it
  9. Now you should be able to connect your mailboxes to MailReach successfully


As Microsoft regularly changes their admin processes, if this doesn't work, please let us know using the Chat support. We're sorry for the inconvenience.


Step 2 : Go back on MailReach and try connecting again using the 'Sign in with Outlook/Office 365' button


  1. Go back on MailReach
  2. Click on Connect account
  3. Select Outlook/Office365
  4. Make sure you're logged in to the Outlook account you want to warm
  5. Click on Sign in with Outlook/Office 365
  6. If asked, select the account you want to warm


This time, it should work!


If not, please contact us using our chatbox.


If it does not work and everything in the step 1 was done as expected, you can retry in 15 minutes to add your account on MailReach, sometime there is a propagation delay on Outlook/Office. We're sorry for the inconvenience.



If you still can't manage to connect, please follow these additional steps


Method 1


What seems to always work is to first connect to MailReach a mailbox that is an admin. There's no need for admin approval when the mailbox is an admin.


You can connect it by clicking on Sign in with Outlook/Office365


Once this admin mailbox is connected, then you'll be able to connect non admin mailboxes without needing approval.


Once you've connected the mailbox you actually want to connect, then you can remove the Admin mailbox from MailReach if you don't need to warm it.


We know, it's not ideal, but it's always tricky with Microsoft. Our apologies for the friction.


Method 2


If it still doesn't work, relax. Depending on the settings of your Workspace, some additional steps may be required.


  1. Connect an admin account of your Office 365 tenant on MailReach
  2. Go back on the Azure portal as a Global Administrator or Privileged Administrator.
  3. Click on Microsoft Entra ID
  4. On the left menu, click on Enterprise applications > Click on Mailreach
  5. On the left menu, click on Permissions
  6. Click on the blue button : Grant admin consent for [Your company]
  7. You can remove the office 365 admin account from MailReach if this is not the account that you want to connect here
  8. Try connecting again your mailbox on MailReach using the Sign in with Outlook/Office 365 button


If you have done all these steps but still can't connect, please contact us by using our chat support.

Updated on: 02/10/2025

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