Setting DisableMergeInstance=1 in registry doesn't work. Is there a way to notify Microsoft about this bug?

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MelCalucin-0282 asked Apr 14, '22 CeasarChenMSFT-3458 commented Apr 19, '22

Setting DisableMergeInstance=1 in registry doesn't work. Is there a way to notify Microsoft about this bug?

Setting DisableMergeInstance=1 in registry doesn't work per this document:

https://docs.microsoft.com/en-US/office/troubleshoot/excel/force-excel-to-open-new-instance

I believe I'm on the latest version of Microsoft Excel for 365 MSO.

Is there some place I can log this defect?

Thanks.

Regards

Mel Calucin

office-excel-itpro

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CeasarChenMSFT-3458 · Apr 15 at 01:54 AM

Hi, @MelCalucin-0282
I'm working on it and will reply when there is progress.

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Answer 1 · 2022-04-15T05:12:45.837Z

CeasarChenMSFT-3458 answered Apr 15, '22 CeasarChenMSFT-3458 commented Apr 19, '22

Hi, @MelCalucin-0282
Welcome to the Q&A Forum. You can check in the Task Manager to see if there are two Excel programs.

If you really don't have two Excel programs, make sure the new DWORD value is 32-bit and binary.

Close the registry, open two Excels from the Excel icon.
Using File Open in the Excel application or double-clicking the file in Windows Explorer will still open in the same instance as designed,
And this method does not work for opening existing workbooks, only for new workbooks.

Note: Improper registry modifications can cause serious problems. Therefore, please follow the steps strictly. For further protection, back up the registry before modifying it.

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CeasarChenMSFT-3458 · Apr 19 at 05:55 AM

Hi, @MelCalucin-0282
Did you try my method, has the problem been solved?

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