Ángel -
Thank you - that's a good observation. I'm sure we've been migrated many, many times, and I do have other clients connected to this Exchange account: another Evolution client (no real troubles with it), and an Android Outlook client.
Milan -
Fixing the debugging _expression_ yields more of the same: 1. folder names that are more-often-than-not '(null)' in the Evolution client, and 2. the only consistent error is a bit of XML: <?xml version="1.0" encoding="utf-8"?> <s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/"> <s:Header> <h:ServerVersionInfo MajorVersion="15" MinorVersion="20" MajorBuildNumber="4951" MinorBuildNumber="19" Version="V2018_01_08" xmlns:h="http://schemas.microsoft.com/exchange/services/2006/types" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/> </s:Header> <s:Body> <m:SubscribeResponse xmlns:m="http://schemas.microsoft.com/exchange/services/2006/messages" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:t="http://schemas.microsoft.com/exchange/services/2006/types"> <m:ResponseMessages> <m:SubscribeResponseMessage ResponseClass="Error"> <m:MessageText>Id must be non-empty.</m:MessageText> <m:ResponseCode>ErrorInvalidIdEmpty</m:ResponseCode> <m:DescriptiveLinkKey>0</m:DescriptiveLinkKey> </m:SubscribeResponseMessage> </m:ResponseMessages> </m:SubscribeResponse> </s:Body> </s:Envelope> 3. and a trailing error: (evolution:13676): evolution-ews-WARNING **: 11:49:26.814: /wrkdirs/usr/portsmail/evolution-ews/work/evolution-ews-3.42.3/src/EWS/common/e-ews-notification.c:411: Id must be non-empty.
The most frustrating thing about all of this is how nondeterministic it feels - yesterday, Evolution started and recognized folder names correctly. Today, it didn't. When I start it w/debugging turned on, the result is the same (folder names are all '(null)').
There probably aren't many other FreeBSD+ews users, but I'll check in greater depth on the forums. Thanks to you both for your time! Best, Bridger
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