How do I move my Office installation from 32bits to 64Bits without re-installing ?

I have office 2016 installed but it is 32Bits.

I would like to move it 64Bits as I am having trouble opening big files in Excel ....

Is there a way I can do this without re-installing ?

My problem is with Outlook as I have IMAP folders (around 30GB) and I would need to re-download the whole thing ?

Pierre AmmounIT ConsultantAsked:
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Tom CieslikIT EngineerCommented:
As far as I know, this is working same like OS, so You can't convert 32 bit to x64 without re-installation.
I've asked my friend from Microsoft support and he confirmed, that there is no way to convert x86 to x64

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Hello ThereSystem AdministratorCommented:
No, there isn't.
Also you need to have x64 architecture of your OS to install x64 programs.

What you should do:
Uninstall 32-bit Office version. Then you need to get x64 installer and install Office again.
Yes, you need to download it it you haven't done yet.
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