Edit a LinkedIn campaign group (Campaign Manager campaign)

Changes the name, lifetime budget, run dates or status of a campaign group (a campaign in Campaign Manager). Use when: the shared ceiling across several campaigns needs to move, or a whole initiative should stop or start at once. Changing the group is the efficient way to act on many campaigns together. Do not lower a group budget below what it has already spent: every campaign inside stops immediately and lowering it further will not bring them back. Check spend with linkedin_get_campaign_performance first. Do not pause a group to stop one campaign — that takes everything inside down with it. Use linkedin_pause_campaign. Setting the group ACTIVE does not start anything on its own: each campaign inside keeps its own status. Setting it PAUSED stops everything inside regardless of theirs. Returns the group read back from LinkedIn.