Other Groove users may continue to see you as online for up to 15 minutes if you are abruptly disconnected from the network (916350)

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If you are abruptly disconnected from the network, presence information may not be updated for as long as 10 minutes locally and 15 minutes for peers. For example, this behavior may occur if you disconnect the network cable or if the power to the network hub is lost.

When Groove starts, it publishes presence information for the active account on an associated Groove relay server. Workspace peers and contacts from other subnets subscribe to the presence information for the account through that relay server. Therefore, your contacts on other LANs see your account as online and active in a workspace. If you exit Groove or if the network connection closes in a controlled manner, Groove will notify the relay server that Groove is going offline. Locally, Groove will be immediately aware that it cannot connect to other users.

However, if the connection ends abnormally, delays in awareness may occur both locally and for peers. Those delays vary depending on how the two computers connect to the relay server. When no notification of a status change is sent to the relay server, the server may take five minutes to determine that the client is inaccessible. Other Groove clients that connect to the relay server by using a Simple Symmetrical Transfer Protocol (SSTP) connection will receive the notification within seconds after the status changes on the relay server.

Groove clients that connect to the relay server by using an HTTP connection will not receive the change immediately. Groove HTTP connections use polling at intervals that decrease with inactivity. The maximum polling delay is five minutes. If both computers connect by using HTTP, the relay server may take five minutes to expect a poll from the affected computer, another five minutes to determine that the disconnected computer is offline, and another five minutes for a peer to fetch this information. The maximum cumulative delay is 15 minutes.