In ArcMap, is it possible to modify the timeout time that establish that a layer cannot be reached?
Working with a mxd with several layers that have its datasource missing, I think that the time that ArcMap needs to open that mxd is directly related with the sum of the timeout value of all broken link layers.
If there would be a possibility to decrease that timeout value, the time that ArcMAps needs to open will be less
On the ArcMap side (client) there is not an exposed setting for this.
No settings are listed in Advanced Settings document found in c:\program files (x86)\ArcGIS\Desktop10.8\Utilities regarding layer timeouts.