Troubleshooting: Unable to Assign All User Book Resources in Room Mailbox

Are you having trouble assigning all user book resources in your room mailbox? Don't worry, we're here to help! In this article, we will guide you through the troubleshooting steps to resolve this issue. Just follow the steps below and you'll be able to assign all user book resources in no time.

Step 1: Check User Permissions

The first thing you need to do is check the user permissions for the room mailbox. Make sure that the users who are trying to assign the book resources have the necessary permissions. To do this, follow these steps:

1. Open the Exchange Admin Center (EAC) or Exchange Management Shell (EMS).
2. Navigate to the room mailbox settings.
3. Check the user permissions and ensure that the users have the "Booking Delegate" or "Editor" role.

If the users do not have the required permissions, you can assign them by following these steps:

1. Open the EAC or EMS.
2. Navigate to the room mailbox settings.
3. Add the users to the "Booking Delegate" or "Editor" role.
4. Save the changes.

Step 2: Verify Resource Scheduling Options

Next, you need to verify the resource scheduling options for the room mailbox. The resource scheduling options determine how the room mailbox handles meeting requests and conflicts. To check the resource scheduling options, follow these steps:

1. Open the EAC or EMS.
2. Navigate to the room mailbox settings.
3. Click on "Resource Scheduling".
4. Make sure that the "Automatically accept meeting requests and process cancellations" option is enabled.
5. Ensure that the "Allow conflicts" option is disabled.
6. Save the changes.

If the resource scheduling options are not configured correctly, it can prevent the room mailbox from assigning all user book resources.

Step 3: Check Resource Booking Policies

Resource booking policies control how the room mailbox handles meeting requests from different users or groups. It is possible that the resource booking policies are preventing the assignment of all user book resources. To check the resource booking policies, follow these steps:

1. Open the EAC or EMS.
2. Navigate to the room mailbox settings.
3. Click on "Resource Booking Policies".
4. Review the existing policies and make sure they allow all users to book the resources.
5. If necessary, create a new policy that allows all users to book the resources.
6. Assign the policy to the room mailbox.
7. Save the changes.

Step 4: Restart Microsoft Exchange Information Store Service

If the above steps did not resolve the issue, you can try restarting the Microsoft Exchange Information Store service. This service is responsible for managing the Exchange databases and may need a restart to apply the changes. To restart the service, follow these steps:

1. Open the Services management console on the Exchange server.
2. Locate the "Microsoft Exchange Information Store" service.
3. Right-click on the service and select "Restart".

After the service restarts, check if you are now able to assign all user book resources in the room mailbox.

Congratulations! You have successfully troubleshooted the issue of being unable to assign all user book resources in your room mailbox. If you followed all the steps correctly, you should now be able to assign the resources without any problems. If you are still experiencing issues, we recommend reaching out to your IT support team for further assistance.

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