How to Resolve ‘Permission Denied’ Issue when Sending Emails in Outlook?

Summary: If you are facing the Permission Denied issue in Outlook, then you are probably using a shared mailbox. This article will show you 5 ways to fix the problem. We will also show you how to use OST to PST converter software, and how to recover files on the off chance that things go wrong, and you lose data. If you do lose data, use an OST to PST converter tool.

Table of Content:

• Resolve ‘Permission Denied’ Issue when Sending Emails in Outlook/ Permission Denied Issue in Outlook
• What causes the “Permission Denied” issue when sending emails in Outlook?
• Fix 1: Verify the “Send on behalf”/ “Send as” permissions
• Fix 2: Verify Outlook Web App (OWA) permissions
• Fix 3: Use the Outlook Global Address List (GAL)
• Fix 4: Check the Read/ Write File Permissions [Permission Denied Issue in Outlook]
• Fix 5: Rebuild the .OST (Offline Outlook Data) file
• What to do if you Lose Data During the Process?

Resolve Permission Denied Issue when Sending Emails in Outlook/ Permission Denied Issue in Outlook

The “Permission Denied” issue when sending emails in Outlook typically occurs when attempting to send an email from a shared mailbox, often due to insufficient permissions.

This error can interrupt email communication and impact productivity.

In this guide, we’ll cover the main causes of this error and offer straightforward solutions to fix it, including steps for using OST to PST converter software for dealing with inaccessible OST files.

Also Read: Why Outlook ‍365 is Not Sending Emails and How to Fix It?

Below is what the send/ receive error could look like for you in Outlook.

What causes the “Permission Denied” issue when sending emails in Outlook/ Permission Denied Issue in Outlook?

There are several reasons which might cause you to run into the “Permission Denied” issue when sending emails in Outlook.

The most common of them are listed as under:

1. Insufficient Permissions [Permission Denied Issue in Outlook]

The user might lack the necessary permissions for the mailbox they’re trying to use. 

Most commonly the absence of “Send As” or “Send on Behalf” permissions cause the “Permission Denied” issue when sending emails in Outlook. 

If your mailbox reads “Full Access” as a permission, this allows for mailbox management, but does not allow sending emails.

2. Permission Delay- Permission Denied Issue in Outlook

It might take up to 60 minutes for “Send As” or “Send on Behalf” permissions to activate.

Thus, if you just gave your mailbox the required permissions, then wait for 60 minutes to let the server cycle in those permissions.

3. Group Policy Restrictions

In some organizations, group policies set by administrators can restrict certain actions in Outlook, including sending emails from shared mailboxes.

4. Antivirus or Firewall Interference

Sometimes, antivirus software or firewalls can interfere with Outlook’s ability to send emails, mistakenly flagging outgoing messages as threats.

5. Exchange Server Configuration Issues

Misconfigurations or issues with the Exchange server, such as incorrect recipient policies or transport rules, can also lead to the “Permission Denied” issue when sending emails in Outlook.

And with the common causes out of the way, let us jump into the fixes.

Also Read: How to Fix “Outlook Stuck on Processing” Error?

Fix 1: Verify the “Send on behalf”/ “Send as” permissions [Permission Denied Issue in Outlook]

This is the easiest way to fix the “Permission Denied” issue when sending emails in Outlook.

Follow these steps to assign “Send As” permissions.

1. Sign into the “Exchange Admin Center” (EAC) and navigate to “Recipients.”
2. Select either the “Mailboxes” or “Shared” tab to find the mailbox you require access to.
3. Choose the appropriate Shared Mailbox or User Mailbox and opt to Edit it.
4. Go to “Mailbox delegation” and then press the “(+)” icon.
5. Locate and choose the user who requires the permissions, then select them.
6. Select “Send As” in the permission options and hit the Save button to finalize the permissions setup.
7. To add “Send on Behalf” permissions, follow the same process.

Note that after assigning permissions, there could be a delay of up to 60 minutes before the changes are implemented. This is because the exchange servers cycle every hour, so allow for that extra time before trying to resend any mails. If you can send mails now, you have fixed the “Permission Denied” issue when sending emails in Outlook.

Fix 2: Verify Outlook Web App (OWA) permissions

Sometimes, you will face the “Permission Denied” issue when sending emails in Outlook even with the correct permissions.

If you’re getting permission errors even with the correct permissions, follow the steps below:

1. Try logging into Outlook on the Web (OWA) to see if the server is online.
2. If you can’t access OWA or Outlook online, it’s likely the server is down, possibly for maintenance or a regular restart.
3. Wait for the server to come back online before trying to send emails again.
4. You can access OWA by navigating to outlook.office.com in a browser of your choice. You can also navigate to OWA from Microsoft365.com, as shown under.

If you still face the “Permission Denied” issue when sending emails in Outlook after a few hours, contact your system administrator for help.

Fix 3: Use the Outlook Global Address List (GAL)

To prevent the “Permission Denied” issue when sending emails in Outlook, follow these steps, and remember, don’t just type the address in the “From” field:

1. Open Outlook and click “New Email” to start composing a message.

2. In the new email window, look for and click the “From” button, as shown below.

3. Select the correct email address you wish to send mail from.

4. Click the “To” button, and select the “Address Book”, as shown below.

5. Ensure you switch the address book to the Global Address List (GAL), as shown under.

6. Search for and select the user or mailbox you have “Send As” permissions for.

7. Now, you can compose and send your email.

Also Read: Outlook Not Updating Mail Folders in Cached Mode

Fix 4: Check the Read/ Write File Permissions [Permission Denied Issue in Outlook]

When dealing with the “Permission Denied” issue when sending emails in Outlook, checking the Outlook data file (OST) permissions is a crucial step.

Here’s how to to check and authorize the proper permissions:

1.  Close Outlook completely.

2. Press the Windows key + R,

3. Type in “%localappdata%\Microsoft\Outlook” without the quotes and press Enter, as shown under.

4. This action opens the File Explorer window with the OST file visible, as shown below.

5. Right-click on the OST file and choose “Properties” from the context menu.

6. Make sure the “Read-only” checkbox is not selected.

7. Click on the “Advanced” tab and ensure “Encrypt content to secure data” is unchecked.

8. Apply the changes by clicking “Apply” then “OK”.

Open Outlook again and attempt to send emails. This process helps in resolving permission issues related to the OST file in Outlook.

Fix 5: Rebuild the .OST (Offline Outlook Data) file

If the previously mentioned solutions don’t solve the “Permission Denied” error in Outlook, rebuilding the OST file might help.

Here’s a step-by-step guide:

1. Close Outlook and launch the Run app by pressing Windows key + R.
2. Type in “%localappdata%\Microsoft\Outlook” without the quotes into the Run dialog box, then press Enter. This opens the folder containing the OST file.
3. Rename the OST file by adding a .bak extension to the end of the file name. This serves as a backup.
4. As an alternative to renaming, you could also cut and paste the OST file into a different folder or drive for backup purposes.
5. Open Outlook again. Since the original OST file has been renamed or moved, Outlook will create a new OST file and begin syncing all mail items from the mailbox server automatically.
6. After the synchronization is complete, try sending a new email to see if the issue has been resolved.

Also Read: Emails showing in Outbox on the server but not visible in Outlook user’s Outbox?

What to do if you Lose Data During the Process?

Sometimes, you may find that your mail service is now working, but you’re missing a few emails and contacts here and there. This can easily be fixed, by converting your .OST file to a .PST (personal storage table) file instead.

Converting your OST files to PST might help you in several ways:

• Data Recovery:

It can recover data from the original OST file that wasn’t re-synced to the new OST file, ensuring you regain access to all your emails and contacts.

• Backup and Archiving:

Converting to PST allows for easy backup or archiving of your Outlook data, making it portable and accessible on any computer with Outlook.

• Migration and Restoration:

This process simplifies migrating your mailbox contents to a new Outlook setup, enabling a seamless restoration of your data.

• Accessibility Issues Resolution:

If the OST file becomes inaccessible due to corruption, converting it to PST bypasses these issues, making your data accessible again. To do the conversion, use an OST to PST converter tool, like Stellar Converter for OST. Simply load in your OST file, and click on ‘Convert”.

Also Read: Why Do Deleted Emails Keep Coming Back in Outlook?

FAQs

1. What is the Difference Between OST and PST files?

The Difference between OST and PST are- OST files are used by Outlook to store a synchronized copy of mailbox data for offline access, while PST files are used for storing personal mailbox data locally, including emails, contacts, and calendar events, and are ideal for backups, archives, and data transfers.

2. What happens to the original OST file after conversion?

The original OST file remains intact and unchanged after conversion. Third-party OST to PST converter tools read the file and create a separate PST file without modifying the original OST.

Also Read: How to Repair OST Files in Outlook?

3. Can I convert an OST file to PST if I’m no longer connected to the Exchange server?

Yes, third-party tools can convert OST files to PST even if you’re not connected to the Exchange server, which is particularly useful for accessing data in orphaned or inaccessible OST files.

4. Can I convert a corrupted OST file into a PST file?

Yes, the Stellar Converter for OST is designed to recover data from corrupted OST files and convert them into PST format. However, the success rate may depend on the extent of the corruption.

Also Read: Outlook Error “Something is wrong with your OST file” 

5. What should I do if the converted PST file is larger than the OST file?

PST files can sometimes be larger due to differences in file structure. If size is a concern, consider using Outlook’s tools to compact the PST file or splitting it into smaller, manageable files.

Also Read: Unlock the Secret: Free Methods to Convert OST to PST in Outlook