Sashen harkokin waje yana ɗaukar nauyin dukkan harkokin waje, waɗanda suka shafi dangantakar Daular Khilafah da ƙasashen waje, ko menene waɗannan harkoki da dangantaka suka kasance. Ko suna da alaƙa da fannin siyasa da abin da ya ƙunsa kamar kulla yarjejeniyoyi, yarjejeniyoyin zaman lafiya, tsagaita wuta, tattaunawa, naɗa jakadu, aika Manzanni da wakilai, da kafa ofisoshin jakadanci da ofisoshin ƙasashen waje. Har ila yau ya haɗa da dangantakoki da suka shafi harkokin tattalin arziki, noma, da kasuwanci, da kuma hanyoyin sadarwa na gidan waya ko sadarwa ta waya da ta mara waya, da sauransu. Sashen harkokin waje ne ke gudanar da dukkan waɗannan al'amura, domin suna da alaƙa da dangantakar Daular Khilafah da sauran ƙasashe.

The foreign affairs department undertakes the responsibility of all foreign affairs, pertaining to the relations of the Khilafah state with the foreign states, whatever these affairs and relations may be. Whether they are related to the political aspect and what it entails like the formation of pacts, peace treaties, cease-fires, negotiations, appointing ambassadors, sending Messengers and delegates, and establishing embassies and consulates. It also includes relations, which are related to economical, agricultural, and trading matters as well as postal communications or wire and wireless communications etc. The foreign affairs department runs all these matters, because they are concerned with the relations of the Khilafah state with other states.

Manzon Allah ﷺ ya kafa dangantakar diflomasiyya da sauran jihohi da hukumomi. Ya aiki ‘Uthman bin ‘Affan ya yi shawarwari da Quraishawa, kamar yadda shi kansa ya yi shawarwari da wakilan Quraishawa. Ya aika wakilai zuwa ga sarakuna, kuma ya karɓi wakilan sarakuna da shugabanni. Haka kuma ya kulla yarjejeniyoyi da yarjejeniyar zaman lafiya. Haka nan bayan rasuwarsa, Khulafa'ansa sun kasance suna kafa dangantakar siyasa da sauran jihohi da hukumomi. Suna naɗa mutane su aiwatar da waɗannan ayyuka a madadinsu, bisa ka'idar cewa duk aikin da mutum zai iya yi da kansa, yana iya wakilta wani ya yi masa shi.

The Messenger (pbuh) established foreign relations with other states and entities. He sent ‘Uthman bin ‘Affan to negotiate with Qur’aysh just as He negotiated with the delegates of Qur’aysh. He sent delegates to Kings and He received the delegates of Kings and leaders. He also concluded pacts and peace treaties. Similarly after him, his Khulafaa’ used to establish political relations with other states and entities. They used to appoint people to carry out these actions on their behalf, on the basis that whatever an action a person can perform by himself, He can delegate it to some other person to carry out it on his behalf.