IDA with Teams comes with a mechanism that lets users specify what files should be ignored when adding files from their local machines to the vault_server.
The main hvignore file (path/to/install-dir/hvignore)
In IDA install directory, you will find the "main" hvignore file, that is pre-populated with a list of files that you would typically not want to add to the vault_server, such as .bak backup files and unpacked IDA database files: .id0, .nam, etc...
The syntax for hvignore is very close to that of .gitignore files.
Additional .hvignore files
In addition to that file, you can have .hvignore file (notice the . - dot) placed in your site's directory structure.
When found, those files' contents will be appended to the main file's contents.