The 1988 Federal Constitution of the Federative Republic of Brazil, in Article 170, section IX, among the general principles of economic activity, granted favorable treatment to micro and small businesses, and in Article 179, it granted differentiated legal treatment aimed at incentivizing them by simplifying their obligations (BRAZIL, 1988). Complementary Law N°. 123/2006 and the new Law on Public Procurement and Administrative Contracts, Law N°. 14.133/2021, ensured the application of benefits to micro and small businesses in accessing the public procurement market (BRAZIL, 2006; 2021). The Statute and the Institutional Development Plan 2020 - 2029 of the Federal University of Rio Grande do Norte defined among the principles to be achieved by the Institution, the contribution to the "socioeconomic development of the state, the region and the country" (UFRN, 2002; 2020). Applied research was carried out in a federal institution, with a qualitative-quantitative, descriptive, and exploratory approach. Procedures such as documentary research, focus group, and questionnaire were used to identify the reasons that led to the disqualification of micro and small businesses in electronic bids held from 2019 to 2021. Such events were categorized and classified, demonstrating that non-compliance with the specification requirements of the item being bid and the referential price were the main reasons for rejecting proposals, and non-compliance with the technical qualification of companies was the most frequent occurrence of disqualification. The focus group of bidders proposed training of the agents involved in the entire chain of the electronic bidding process as one of the main ways to mitigate future occurrences. The work was limited to the analysis in a single public agency, and the only work division heard was the External Phase of Electronic Bidding. Situational diagnosis, FAQ electronic bidding - Suppliers, and proposal for the realization of the 1st Forum of purchases and contracts in the researched institution were carried out.