[Evolution] evolution-ews 3.16.5: stale folder

[camping mike franken de (Michael Hirmke)]

Hi all,

evolution seems to interpret a "/" in an Exchange folder name as
subfolder structure.
If I create a folder named "x / y" in Outlook, I get a structure with y
as a subfolder of x in evolution. The problem is, that I can't get rid
of these folders, even if I delete them in Exchange, because evolution
always tells me, that the folder can't be found. Other actions with
these folders are not possible, too.

How can I get rid of these folders?
And how can I configure evolution ews to deal with folder names like
this?

Thx and bye.
Michael.
-- 
Michael Hirmke