If you review the item in the Sent Items folder it shows the old location and was not updated.
STATUS: FIXED This issue is fixed by a change in the service.
Last Updated: May 1, 2018 ISSUE Starting with Version 1802 (Build 9029.2167) Outlook introduced an update that treats changes to a meeting’s attachments, subject, and body as updates which must be sent to all attendees.
Based on customer feedback, Outlook will remove body changes from triggering updates to all attendees.
This issue occurs because the Outlook team fixed a bug to respect the setting "Print using grey shading".
STATUS: FIXED To print the calendar in color, disable the "Print using grey shading" setting in Page Setup under Print Options.
STATUS: FIXED This issue is fixed in Monthly Channel Version 1802 (Build 9029. To get the latest update immediately, open Outlook and choose File Last updated: February 20, 2018 ISSUE When you print your calendar you find that it switched from printing in color to black and white.
In the meantime, you can try one of these workarounds: Last updated: January 24, 2018 ISSUE After installing the January Update for MSI versions of Outlook, attachments are removed when forwarding emails in plain text.Last Updated: April 6, 2018 ISSUE When an on-premise Outlook user opens the Scheduling Assistant to book a meeting, cloud users Free/Busy shows as slashed lines.This will normally occur if the user added to the meeting has time blocked on their calendar with availability as Working Elsewhere.Restarting Outlook should fix the issue but you may have to restart Outlook up to three times to pick up the change.Information for this issue is also provided in this article: Meeting location updates are not reflected in recipient calendar in Outlook 2016.