If the objective of the seminars are primarily for the capacity building of admins (training like events) a lot of topics can be included such as communication, time management, reporting writing, record keeping, minutes taking, telephone ethics, organizational behaviour, HR functions etc etc.

However, often companies (having offices in multiple cities) arrange such seminars for networking and creating harmony and consistency in their administrative works mainly through interpreting polcies. In such seminars which are kind of workshops admins coming from different cities (but working in one firm) usually describe their standard way of doing a thing. In this way, they work out the incosistencies and find a way out in light of actual policy or properly interpret the policy.

mnaeempk
Naeem in Pakistan