Create a guest access allow list request

Note: To check if a domain has already been allow listed, please go to the Manage External Organisations Access and search for the domain.



  • If the domain is listed as Active this indicates that it has been allow listed within the NHSmail shared tenant and Guest Access accounts can be created for users linked to this domain.
  • If the domain is listed as Pending this indicates that another Requestor Organisation has raised an allow list request for this domain and that the request is still under review at this stage

Introduction to external organisation access management

As part of the Azure B2B guest access service and NHSmail Teams collaboration, controls have been put in place to mitigate the risks associated with sharing data with external organisations.

One of these controls is an external organisation domain allow-listing- only external users that are associated to allow-listed external organisations can be invited as guest users of the O365 tenant or NHSmail Teams.

If you are a Local Administrator you can request, via the NHSmail portal, for a new external organisation’s domain to be allow-listed but only if the domain has not been allow-listed already.

Creating a request to allow-list an external organisation

1. Click Admin in the navigation bar at the top of the screen in the NHSmail portal and select Manage External Organisation Access from the dropdown menu.



2. Click Add and select External Organisation Access Request.



Populate the request form with the details of the external organisation that you would like to be allow-listed



Note: The mandatory fields are those that have an asterisk after the description, for example, Primary Contact Email*


Organisation Domain must be in correct format. Please note, wildcards (*) cannot be used.

Handy Hint

The NHSmail Sponsor 1 will be pre-populated with the requestor’s name, however an additional sponsor can be added using the Add button.

It is recommended to have a second sponsor who can approve the request in the absence of the first sponsor.

4. Click Submit to send the request for approval



Once the request is submitted, an automated email will be sent to the NHSmail Feedback team– asking them to review and approve the request. Once they have made their decision, you will receive an email confirming whether the request has been approved or rejected.

If approved, the external organisation’s domain will be allow-listed within Azure Active Directory (AD), meaning NHSmail users (who are configured as eligible guest inviters) will be able to invite users from this external organisation as guests of the O365 tenant or NHSmail Teams.

If rejected, please discuss the request with the NHSmail Feedback team.

Last Reviewed Date 14/05/2021
Updated on 12/08/2022

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