Since Ethernet in cat 5 or 6 is good for 100 meters, nothing looks too long a run.
However there is one strange looking connection on the server on the left to what may be a switched hub. Hope someone can tell you why that's odd.
Hi - I am looking to run a CAT6 cable from one office to another two via a server cupboard and storage area, a large chunk (30-40m) of this cabling will be outside (in conduit pipes running alongside 240v mains cabling). Here is a picture of what I propose to do, please ask if anything is unclear. I am sure something here must be wrong - I need you to tell me what!
Thanks in advance