Thank you, but actually, I should have specified when I said "I don't see any solutions after a web search" that I found those instructions and followed them, but it didn't help. We left our computers while we went out for dinner, and checked them 3 hours later. Miraculously, the missing calendars showed up after that. We just must not have waited long enough (30 minutes) for them to show up.
Reminds me of the first time we set up a home network, about 20 years ago, using 10-base-2 (coax). The instructions (for either Microsoft or Dell, don't recall which) actually said that "it may take up to 60 minutes for all computers to show up on the network". Didn't take that long, but it did take a good 15 minutes, IIRC.
Thanks, and Happy Holidays!