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Regular Expression

A regular expression is a character sequence used to specify a search pattern. Regular expressions can be complex to write and validate. If an invalid regular expression is entered, nothing will be imported. Also, pay attention to the fact that some characters and sequenced may have special meaning, for example a dot "." means any character inside the Regular Expression. To escape special characters, prepend them with backslash (\). Information about how to use regular expression refer to the Microsoft Documentation.

 

Example:

[a-z]+\.sitea\.mydomain

[a-z]: all lowercase letters from "a" to "z".

+: the preceding element can be matched one or more times.

\.: matches a "."

Therefore this regular expression can be used to filter for everything that starts with letters only and ends with ".sitea.mydomain".