Hi Hmaltz,
Does the issue occur when accessing your account on another computer? If so, the issue is related to the “Direct file access” settings. These settings control direct access to files in Outlook Web App. For example, if a message contains an attachment, the user clicks on the file and is given the choice to open or save the file. You can control the types of files users are allowed to access, and you can control the actions that are available for a specific file types.
Here are the different methods of including files in an e-mail message:
“Attachments”: The user clicks on the attachment to open or save it.
“MIME embedded files”: The files are embedded directly in the body of the message. Typically, MIME embedded files are image files.
You can control access to files based on the file extension or file type.
To fix this issue, you can perform the following steps to configure the parameter “AllowedMimeTypes”. This parameter specifies the MIME embedded file types that users can directly access in Outlook Web App without restrictions.
1. Right click Windows PowerShell and click Run as administrator.
2. Then click Yes in the following pop-up window.
3. When the Windows PowerShell window open, run the commands in Step 4 and Step 5 in the article below:
http://help.outlook.com/en-us/140/Cc952756.aspx#Step4
http://help.outlook.com/en-us/140/Cc952756.aspx#Step5
4. Then run the commands in Step 2, 4, 5 under “Connect Windows PowerShell on your local computer to the cloud-based service” in the article below:
http://help.outlook.com/en-us/140/Cc952755.aspx
After connecting it successfully, you will receive the following page.
5. Then run the following commands to configure “AllowedMimeTypes”.
Set-OwaMailboxPolicy -Identity OwaMailboxPolicy-Default -AllowedMimeTypes '.bmp', '.gif', '.jpeg', '.png'
After finishing the above steps, please check the issue in Outlook Web App again. If the issue persists, please capture a screenshot of the situation.
Thanks,
Monica Tong