Each new entity/customer should be set up as a new organisation. Each organisation is it's own collection of users, assets, geofences etc. So set up each new client as an organisation to keep them grouped separately to your other clients.
See Getting Started - Telematics Guru

Yes - completely separate users/entities should be set up as organisations, but even within an organistion, we can set which assets a user should have access to on the user account. See Getting Started - Inviting Users

We have an extensive list of white label options, see here Telematics Guru White Labelling 

Telematics Guru is very customisable so that our partners can selectively enable/disable different features on an Organisation and User level. You may simply not have a permission enabled. Check first on the organisation and if you can't find it contact our support team to have it enabled. 

See Push Notifications in the TG App

Contact your local branch for a price list, and see TG - Asset Billing, Admin and Billing Reports

TG is hosted on Microsoft Azure cloud based servers. These are hosted in data centres close to the region they serve. See here TG Region Specific Details

Yes this is one of the key features. See How To Guide: Geo-fences

See Telematics Guru - Asset Addresses for troubleshooting. Usually, the asset just needs to make a trip and it will correct itself. 

Setting up an alert to trigger when the device hasn't connected as expected is not possible on Telematics Guru. A better alternative, however, is the Devices Not Connecting report. This report allows you to view all assets that have not connected within a configured time period. This report can be scheduled for regular checks across a partner.

Telematics Guru allows for multi-search in the asset grid within the Manage Assets page. This is delimited by a semi-colon ( ; ).