Hello,
i have changed my RB750Gr3 to an RB3011.
Everything is working fine but i have Problems with the ip cloud.
The RB3011 is behind an FritzBox (NAT).
The output of
/ip cloud print
is
ddns-enabled: yes
update-time: yes
dns-name: ???.sn.mynetname.net
status: updating...
??? ist only a placeholder 
status of updating is not changing.
please help.
You might want to upgrade to >= 6.43 to make use of cloud2.mikrotik.com which responds much faster than cloud.mikrotik.com.
Disable IP Cloud before updating:
https://mikrotik.com/download/changelogs
MAJOR CHANGES IN v6.43:
!) cloud - reworked “/ip cloud ddns-enabled” implementation (suggested to disable service and re-enable after installation process);
the RB3011 is runnning version 6.43.4