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iTunes Sync Calendars with Outlook - multiple calendars appearing

iTunes Version 12.11.0.26

iPhone 11 ver 14.2

Outlook 365

Windows 10 Pro 20H2

Issue has been around for a while, over a number of updates.

Cannot remember when I first saw it.

Issue:

iTunes Sync Calendars with Outlook > Selected Calendars,

there are 6 calendars named _ModCalxxxx.work

I only have 1 calendar on my iPhone 11 and 1 calendar in Outlook.

What, how, why are these extra calendars??

How do I remove them?


iPhone 11

Posted on Dec 21, 2020 6:57 AM

Reply
2 replies

Dec 23, 2020 12:55 PM in response to softheads

Hi softheads,


Thank you for posting in the Apple Support Communities. We understand you are attempting to identify these Outlook calendar items. We can get you pointed in the right direction. iTunes does not create calendars. This lets us know these calendars are created and stored somewhere within your Outlook configuration.


This means you'll need to work with Outlook support to learn how to locate and modify these entries.


Cheers!

Jan 6, 2021 4:10 PM in response to Chris_C1

Chris_C1, iTunes does interact with Outlook, and that is what I need to know the inner workings of.

A search in MS OL link provided above was less than useless, as expected.

resulting in "Sorry, there are no results for _ModCal"

I really need to find a techie who knows iTunes on a pc, not the Microsoft Store version of iTunes (yes they are different).


These _ModCal entries are some kind of old bones. 

Unfortunately, I cannot figure out where the dog buried them. 


I'm guessing, that when iTunes syncs with Outlook, iTunes creates a changes file (_ModCalxxx)

and then merges the change file with the active Outlook.pst file.

Then deletes the _ModCal file.

No secret that iTunes updates have not always played well with Outlook,

and this, I believe, is a leftover from that interaction.


_ModCalxxx are not “real” calendars. They only show up in iTunes info section.

Not in Outlook calendars, and not on the iphone either. 


No Outlook google connection at all. Not even Gmail. 

No iCloud Outlook connection. 

POP email connections. 

Only Outlook.pst and archive.pst data files. 


Thinking the _ModCal ‘s are stuck in some config file that I cannot find. 


Even a windows registry search comes up nada. 

iTunes Sync Calendars with Outlook - multiple calendars appearing

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