BIG Problem. After updating from 16.3.6885 to 16.3.6893 (to get the EWS fix) late Thursday night, all 4 CPU cores are hanging at just over 50%. See screenshots below.
UPDATE #1: High CPU is from indexing. When I disable the Indexing service in the SmarterMail management interface, CPU drops to normal. Start indexing, CPU climbs back up. I'm watching the indexing progress, and it's not hanging on any specific mailboxes.
UPDATE #2: Disk consumption began increasing rapidly (multiple GB per day) at the same time the CPU issue began-- when the 16.3.6893 update was installed.
UPDATE #3: Full uninstall and reinstall did not help.
UPDATE #4: Had to disable the Indexing service tonight. It was rapidly chewing through disk space by the GB.
UPDATE #5: Uninstalled 16.3.6893 and reverted back to 16.3.6885. No more problems, other than back to the EWS problem of the email timestamp being the date/time the user receives the email (which .6893 was supposed to have fixed)
CONCLUSION: Something in 16.3.6893 broke Indexing.