Answer
(Fatwa: 107/101=B/1429)
(1-2) It is allowed to read it. It is helpful in acceptance of dua. It can be prayed in majlis as well. The different ways and different duas of Khatm-e-Khwajgan are narrated by awliya: 100 times durood in the beginning, 100 times لاحول و لاقوۃ الا باللہ العلی العظیم, 100 times یا قاضی الحاجات, 100 times یا کافی المھمات, 100 times یا حل المشکلات, 100 times یا دافع البلیات, 100 times یا شافی الامراض, 100 times یا رفیع الدرجات, 100 times یا مجیب الدعوات, 100 times یا ارحم الراحمین and then 100 times durood. Thereafter, supplicate to Allah for you and other Muslims.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband