The default period of keeping data history on the CM server is 6 months.

The period of keeping history differs in the following cases:

Presentation and Evaluation -> Online information: 2 days
Presentation and Evaluation -> Watches: max. 2 months or 150 000 samples from all wathces on
                                                                                    the given PC
Presentation and Evaluation -> Zones
    Registration info: 3 years
    Backups: 1 year
    Services: 2 months