iCloud Outlook add-in causes Outlook to hang for 30-120 seconds each time I enter the Calendar.

I have this exact same problem too and despite having tried many solutions on the internet, none of them have made any difference at all. Have you found a solution that worked for you?

Often I have to quit Outlook and restart it but then the issue just occurs again. Incredibly frustrating.

The sync can be very long, nbut only when you sign in from the Control panel. Once you're in Outlook, I don't think you sync that much.

I have the same issue using my old PC. Maybe you should check your hard drive, your memory usage and CPU usage. I fixed it by a new laptop, last year. Usually, this is a sign that you're short on memory and you're using the Windows page system memory file. So, your CPU might come short, your hard drive might be too slow or you don't have enough memory.. Otherwise, your hard drive may be too slow and very fragmented, reqyuiing Windows to spin a lot and read bits of files stored everywhere. The solution would be to defragment your hard drive. or worse.. it's a slow hard drive or showing sign of fatigue.

I'll go with defragmenting the hard drive first, then, the CPU and memory bump.

Brand new laptop with i7 processor and 8GB RAM. Definitely not any of the things you highlighted. P.S. I'm an IT professional so to me these are obvious things to consider.

I also have the exact same issue: every time i switch to the calendar Outlook freezes. Sometimes a few seconds til up to a few minutes! CPU usage stays low. All other system function are working fluent so there is definetaly no hardware resource issue. This is consistent behaviour that occures only when opening the calendar. With the iCloud add-in disabled the calendar opens fast and without any problems.

I have the same issue. Late model laptop, i7 CPU, 8GB RAM, SSD. There are no spikes of any kind when the calendar hangs. Disabling the iCloud plugin resolves the issue (running Outlook 2013 on O365 enterprise).