Status of GUAM and TLS>1.1 ?

[Matthias Busch]

this is quite valuable information. many thanks.

how stable is kolab 16 on stretch?
do I just change debian apt/sources to stretch and run dist-upgrade?

I just saw, documentation now has debian9 too...

What process do you recommend to upgrade from kolab 16 on deb8 to deb9?

change only debian or only kolab or both apt sources?
run apt-get upgrade or dist-upgrade between what changes?

(usually, I change all apt sources, run upgrade, then dist-upgrade)