Cannot open older Excel documents

When attempting to open older Excel documents users may get an error similar to the following

Users will need to convert the document to the newer xlsx format.

To convert the document, we will use Excel online.

Save E-Mail attachment

If the document has been sent from a third party and received by E-Mail, we need to save the document first.

1. Click the down arrow on the attachment and choose Save As
   
   
2. Choose a location to save the folder, select either your OneDrive folder or a SharePoint folder you have access to.

Converting document

1. Sign into Office online - https://portal.office.com
2. From the Apps menu choose either OneDrive or SharePoint depending on where the document is located.
   
3. If the document is located in OneDrive
   1. After opening OneDrive, select My files on the left
      
4. If the document is located in SharePoint, browse to the folder
5. Click on the document you need to convert and open it.
6. In the top right, choose the Viewing drop down menu and select Editing
   
7. Select Convert
   
8. Close the document that you have converted.
9. Go back to your OneDrive or SharePoint page where the files are listed. You should now see two documents. If not refresh the page.
   
10. Select the older xls version and delete it.