IO error when sending PDF via Outlook 1.3.9 on Android 5.02

When trying to send PDF file via Outlook app for Android following error pops up: "Unable to add attachment due to IO error"

(Outlook app v. 1.3.9 on Android 5.02 (Sony Z3+)


Regardless of PDF file, it's size or location (SD or phone).

What's interesting - if you attach several different file-types, after displaying the error above all the other files are attached successfully, except for PDF. 

Same question posted on July 11, July 12, September 1, here http://answers.microsoft.com/en-us/outlook_com/forum/oemail-oattach/cant-add-pdf-attachment-to-outlook-email-unable-to/0bf82e90-5c18-4e3b-98eb-1a90d251ad64 and here 

http://answers.microsoft.com/en-us/outlook_com/forum/oemail-oattach/unable-to-attach-files-files-exceed-attachment/756b5b36-5f23-45fd-965a-4c706826d8b9?rtAction=1443184302347

- to no avail. 

To save time, before some of the formal "technical support"asks some formal questions:

"Provide us the following information to assist you better."

  • Is this issue specific to a particular document/file? ← Any PDF document of any size.
  • What is the file extension and size of the attachment? ← When I say PDF - it means extension is .pdf
  • What are the recent changes that you have made to the computer prior to this issue? ← None manual changes, all updates automatic. 
  • Do you receive any error message? ← Yes, this post and previous one starts with this error message "Unable to add attachment due to IO error", print screen embedded. 

***Post moved by the moderator to the appropriate forum category.***

Answer
Answer

Hi I have had the same issue but is now solved.  

I was using apps to open documents and send as an attachment to Outlook and the message came.

1. You need to open the Outlook app and create new email 
2. Now attached document from the phone - ( You are now asked to accept Outlook to access files in the document library once).  

The error message only appear if Outlook has not been given permission to access document in the phone. 

Hope this helps :)

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Last updated October 5, 2023 Views 8,183 Applies to: