If you are trying to connect to mapping data from the Verizon Fleet Management, Tableau can connect to several spatial file types, more information on creating maps with spatial files can be found here: Create Tableau Maps from Spatial Files - Tableau
Additionally, if there is other data that you wish to connect to, but there are several options for connecting to data sources from Tableau Desktop that are currently supported by a named connector. The data can be mirrored into a supported Tableau data source connection. Information on all supported connections can be found below in the technical specifications for Tableau.
If available for the database Tableau has an ODBC connector can be used to most data sources that have an ODBC driver. I am including several resources for the ODBC connection below. There can sometimes be limitations when using the ODBC connection versus a named connection that is listed in the explicitly on the data source page.
Also, if the data is available over HTTP, the connection to the data source can be made with the WDC(Web Data Connector). I have included several resources for using the Tableau WDC below. The first link is to the Tableau Online Help on the WDC feature. Additionally, I included links to the specific section in the community and the Tableau GitHub section on the WDC.
Another option is to use the Tableau SDK, to create a .tde file of the data set to then be used in the Tableau Desktop program. Additional resources and information can be found below.
I hope these resources help!