Introduction

This article discusses how to remove automapping for shared mailboxes in Microsoft Outlook for Microsoft Office 365.

In Microsoft Outlook 2010 and in Microsoft Office Outlook 2007, Autodiscover automatically maps to any mailbox for which a user has full access permissions. Autodiscover automatically loads all mailboxes for which the user has full access permissions in the following scenarios:

In Outlook, choose File Tools Mailbox Cleanup. Do any of the following: View the total size of your mailbox and of individual folders within it. Find items older than a certain date or larger than a certain size. Archive items by using AutoArchive. View the size of your Deleted Items folder. Jan 24, 2020 What Outlook for Mac Users can do when their Exchange mailbox is full? A better approach would be to archive the old Outlook for Mac mailbox data and retain only the recent and most relevant items in the mailbox. Let us see how you can check the size of your Outlook for Mac mailbox folders and archive their items. ‘Your mailbox has. Opening additional mailboxes. On the Tools menu, click Accounts. Click the plus sign and then click New Account to add an additional Exchange account. In the E-mail address field, enter the email address of the shared mailbox. Under Authentication, enter the credentials for the shared mailbox. Dec 19, 2014 Exchange itself will tell you how big their mailbox really is. Don't rely on Outlook. Within Active Directory (with Exchange plugin) you can specify the size limitations of the mailbox. Their mailbox must be on the outer rim of being full, that won't last long until they purge their mailbox. How to Manage Storage When Your Outlook Mailbox is Full. Once you know that your mailbox is at capacity, it’s probably time to start cleaning it up. Luckily, Microsoft provides a Mailbox Cleanup tool in Outlook that makes it easy to cut down on the amount of email you’ve accumulated. You can find it by navigating to File Tools Mailbox Cleanup. Once you’re in Mailbox Cleanup you will be able to.

An administrator grants full access permissions for a user to access another user's mailbox.
The user has full access permissions to a shared mailbox.

If the user has many mailboxes to which he or she has full access, this behavior may cause performance issues when Outlook starts. For example, in some organizations, administrators have full access to all users' mailboxes in their organization. If this is the case, Outlook tries to open all mailboxes in the organization.

Procedure

To disable automapping, use Windows PowerShell to remove full access permissions from the user for the mailbox, and then add back full access permissions to the user. When you add back full access permissions to the user, use the AutoMapping:$false parameter.

To do this, follow these steps:

Connect to Exchange Online by using remote PowerShell. For more info about how to do this, see Connect to Exchange Online Using Remote PowerShell
Remove full access permissions for the user from the mailbox. This removes automapping. To do this, at the command prompt, type the following command, and then press Enter:
Note
In this command, <Mailbox ID1> represents the mailbox to which the user is granted permissions, and <Mailbox ID2> is the mailbox of the user from whom you want to remove full access permissions.
For example, to remove full access permissions for an administrator from John Smith's mailbox, use the following command:
After you run this command, you're prompted to confirm the action:
Grant full access permissions back to the user for the mailbox, but don't enable automapping. To do this, at the command prompt, type the following command, and then press Enter:
Note
In this command, <Mailbox ID1> represents the mailbox to which the user is granted permission and <Mailbox ID2> is the mailbox of the user to whom you want to add full access permissions.
For example, to add full access permissions for an administrator to John Smith's mailbox, type the following command, and then press Enter:
After you run this command, the following output is displayed.
Identity User Access Rights IsInherited Deny
John Smith <Domain><UserName> Full access False False

Identity	User	Access Rights	IsInherited	Deny
John Smith	<Domain><UserName>	Full access	False	False

More Information

For more info, see Disable Outlook Auto-Mapping with Full Access Mailboxes.

Still need help? Go to Microsoft Community.

Mailbox Full: Your mailbox is full, you may not be able to send or receive items.

As an Outlook user, you may be familiar with this message. With the accumulation of emails, the Outlook mailbox grows in size. And users often neglect or forget this fact. They notice it only after getting the ‘Mailbox Full’ error message while trying to access the mailbox.

What you can do to reduce the size of Outlook mailbox?

In order to send and receive emails without issues, it’s necessary to reduce the size of Outlook mailbox. Deleting some emails and attachments would be the easiest way to do this. But this alone is not enough to cope with the situation. That is why Microsoft has provided some inbuilt features in Outlook to deal with the ‘Full Mailbox’ situation. Also, some third-party Outlook management tools are extremely helpful in this regard.

Instant Solution

Try an automated tool Kernel for PST Compress & Compact to remove unused and unwanted space from the PST files and reduce the large PST file

A few simple ways to reduce mailbox size are:

Delete large Outlook emails and attachments
Use Mailbox Cleanup utilities
Compress the Outlook data file (PST)
Try third-party Outlook management tools like Compress PST, Split PST, Remove Duplicates, Attachment Management

Delete large Outlook emails and attachments

Deleting large emails, undoubtedly, is the wisest technique. Rather than randomly deleting large-sized files, you can follow a systematic approach to manage Outlook attachments . The steps are:

Open Outlook. In the folder list, click Search folder, then select New Search folder.
Scroll down the list and under Organizing Mail, select Large mail. Click Choose under Customize Search Folder.
Specify a size in the ‘Show mail greater than’ box (for example 6000 KB). Click OK to continue.
Click OK again and a folder named ‘Larger Than 6000 KB’ is created under Search Folders. This newly created folder will get updated with the mails of size more than 6000 KB automatically.

When you face mailbox size issues, just go to the Search Folders. There, click on the newly created folder, and delete your mails which are not so important. If you need, you can save the attachments to your drive before deleting it (by right-clicking on the attachment and then clicking ‘Save As’ or ‘Save All’ option). Continue doing this, until the mailbox has enough space for new emails.

Use Mailbox Cleanup Tools

You can trim the size of your mailbox using the options in the Outlook Cleanup Tools (you can access it by following File>Info>Cleanup Tools).

Three options are available in the Cleanup Tools dropdown list:

Shared Mailbox Outlook For Mac

Mailbox Cleanup
Empty Deleted Items Folder
Archive

Using the Mailbox Cleanup Option, you can view your mailbox size/mailbox folder sizes. Also, you can find items larger/older than a specified limit.

Mailbox Cleanup also provides you

Microsoft Outlook Mac Mailbox Full