Using Excel via Office 365, I have noticed a dramatic increase in the amount of time required to open any member of a group of files, each of which have links to other workbooks. 

These are files that I open daily, and have opened daily for quite some time.  Each of them have links to other workbooks, very simple in nature, simply referencing cells in the other workbooks; no calculations are performed in the reference.

The files themselves are fairly small, on the order of 2 MB.  They previously opened in 2-8 seconds, I would guess.  Now, they can take up to 30 minutes(!) to open.  

I noticed this first on the morning of May 25th.  No 365 updates are shown for the 24th or 25th; however, I did have a new message from Windows on my computer that morning letting me know that service for Windows 10 would be ending soon.  

All other Excel files open totally as normal. 

Anyone have ANY idea how to make this make sense?

​Using Excel via Office 365, I have noticed a dramatic increase in the amount of time required to open any member of a group of files, each of which have links to other workbooks.  These are files that I open daily, and have opened daily for quite some time.  Each of them have links to other workbooks, very simple in nature, simply referencing cells in the other workbooks; no calculations are performed in the reference. The files themselves are fairly small, on the order of 2 MB.  They previously opened in 2-8 seconds, I would guess.  Now, they can take up to 30 minutes(!) to open.   I noticed this first on the morning of May 25th.  No 365 updates are shown for the 24th or 25th; however, I did have a new message from Windows on my computer that morning letting me know that service for Windows 10 would be ending soon.   All other Excel files open totally as normal.  Anyone have ANY idea how to make this make sense?  Read More

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