I have this device in our office and I want upgrade it to RouterOS 7
Can I do this?
right now I use stable version of 6.49.19
by this router our team can connect to office and we expose some service outside world
Please guide me if it is possible
without lose current configs
It most cases, upgrade will convert things without issue. And note upgrade involves several reboots and intermediate upgrades to get to "stable", so there be some minutes of downtime (and spotty service availablity since many reboots be needed but likely still be up after reboot before another reboot).
Also make sure you update the /system/routerboard after the upgrade (and reboot) and also I recommend enabling auto-upgrade for RouterBOOT so that you'll keep the firmware and routeros versions in sync.
One thing that might make the upgrade "safer" is by using partitioning before the upgrade. Using partitioning, you can save a partition for 6.49.19 to enable a quick rollback if needed. The RB1100AHx4 should have enough flash. If that's too complex, then make sure you have the .npk's (and any extra-packages used) for 6.49.19 saved local in case rollback is needed.
In all cases, you should save the backup file and an export show-sensitive file=beforeupgrade.rsc (and download both to your PC).
Thank you
Do I have to upgrade step by step for example from 6.49.19 to 7.0.0.1 and then for example 7.0.1 and then 7.0.2 and …
I want use winbox?
I winbox safe or I should use another way?
Winbox is fine.
You will need to do two steps.
The first will be to upgrade to 7.12.1 (this is the only 7 version you will see in Winbox as installable).
Then from it you can go to any 7.x version.
The version you will see in Winbox will be "latest stable", right now 7.20.6.
This version - though marked as "stable" - is seemingly giving a lot of problems to many people, so you might want to think about updating to it or if it is safer to upgrade to a previous, more tested, version such as 7.19.4 or 7.19.6.
BEFORE going on, do think about your actual NEED to update, the transition from 6.x to 7.x is normally fully automated for standard or nearly standard configurations, but there are cases of particular setups where the conversion of settings may not be fully working, you talked about some services exposed, those may need to be re-checked and fixed after the conversion.
In any case before going on, prepare for the worse, since it is a working environment, plan the update in a day that you don't really-really need internet/network and allocate a time slot of a few hours (if everythng goes well it should take less than one hour, but you never know).