In the two previous edition spirits were forced to stay within magic x 100 meters from you (either in astral space on the material plane). Unless you send it on a remote service in which case it would be released once done, even if it had services left to perform).
Unless you bound it, in which case it would end up on 'standby' after completing a remote task and you could also willingly dismiss it for awhile (which would also cause it to be on 'standby') and then call it back with a simple action (not costing a service) once you needed its attention.
But since you can't bind a spirit in this edition... does that mean that all your (potentially 18) summoned spirits will always be forced to stay within magic rating x 100 meters from you (unless perhaps remote service)?
I can see that becoming an issue if you are trying to infiltrate a facility that run some sort of astral observers or having large astral wards to protecting the area around the physical facility......
edit: Ah, they added a new line of text to Spirit Range for this edition:
SR6 p. 149 Spirit Range
...they will try to return within that range unless they have specifically been directed not to.
edit2: Second ah-ha experience; in this edition there also does not seem to be a specific 'remote service' (that will automatically release the spirit after it is done).
edit3: Table on SR6 p. 40 list 'Dismiss Spirit' as an action but the actual action on SR6 p. 41 is missing. There is also no 'Call Spirit' action in this edition. 'Command Spirit', however, mention that you can use it to 'dismiss' a spirit. I guess 'dismiss' in this edition means that "you fully release it even if it have services left" (rather than "go on 'standby' until i call you" as it meant in SR4).