Parallels has the the following product lifecycle strategy for Parallels Remote Application Server:-

Major releases for Parallels Remote Application Server are issued yearly, from a maintenance and support perspective there are two types of versions:

1. Long Term Supported (LTS) versions

2. Non - LTS version

Long Term Supported (LTS) versions:-

To ensure an improved maintenance and support for our customers Parallels will release a Long Term Support (LTS) version periodically. This will mean a longer supported period for LTS versions. 

Each LTS version will be supported for a total duration of 36 months (3 years), made up of 30 months of maintenance followed by an additional 6 months of support. LTS versions will be released in every other major release. 

Example: 16.5 is an LTS version, v17 is non-LTS version, v18 is an LTS version, v19 is non-LTS version, etc… 

Non - LTS version

Non LTS versions will be supported for a total duration of 24 months (2 years), made up of 18 months of maintenance followed by an additional 6 months of support. 

The below table defines the End of Maintenance (EOM) and End of Support (EOS) for the current supported versions:

Note: Any previous versions not listed in above table have now reached EOM and EOS

Definitions

End of Maintenance: Last date of Development Iterations for the product version.

End of Support: Last date the official technical support services will be provided for the product version.