At the end of 2022, the Pension Security Board issued instructions on how to apply for an A1 certificate for working abroad. The guidance has now been clarified for short meetings and business trips, for example:
"However, for short trips for meetings, business and official business, it is not necessary to apply for an A1 certificate unless it is known that the host country requires it. The likelihood of needing a certificate is low for this type of business trip. If it later becomes apparent that an A1 certificate is required, for example by a foreign body or in the event of an accident at work during the journey, it can be applied for retrospectively."
ETK links:
How to apply for an A1 certificate for short meetings and business trips
Ilmarinen's press release on the subject is available at here.